Maharashtra Board Class 5 EVS Part 1 Chapter 18 The Environment and Us Solutions

5th Standard EVS 1 Lesson Number 18 Question Answer The Environment And Us Maharashtra Board

Std 5 EVS 1 Chapter 18 Question Answer

Question 1. Rivers and lakes are filled with water hyacinth.
Answer: Water hyacinth are formed in rivers and lakes due to pollution. That is mainly due to mixture of detergents in the water. To control it the water hyacinth should be removed and waste water from households or washing clothes in water should be banned. This proactive approach helps maintain aquatic ecosystem health.
In simple words: Water hyacinth grows in rivers and lakes because of water pollution, especially from detergents. To fix this, we need to remove the plants and stop dirty water from homes or laundry from entering the water bodies.

🎯 Exam Tip: When asked for solutions to environmental problems, always suggest both removal of the problem and prevention of its cause to score full marks.

Use Your Brain Power!

Question 1. What would happen if no kites (birds) are left in a particular region? Which living things would increase in number? Which would decrease?
Answer: If no kites are left in a particular region, the number of birds, amphibians, small mammals, and earthworms would increase significantly. This imbalance would disrupt the natural food chain.
In simple words: Without kites, their prey like small birds and animals would multiply, causing an imbalance in the ecosystem.

🎯 Exam Tip: When discussing ecological balance, remember to identify both the direct and indirect impacts of removing a species from a food chain.

Answer The Following Questions.

Question (a) What is meant by migration?
Answer: Movement from one place to another for a short period of time or permanently is called migration. Many animals migrate to find food or better breeding conditions.
In simple words: Migration is when animals move from one place to another, either temporarily or permanently, often for food or to have babies.

🎯 Exam Tip: Define migration clearly, mentioning both temporary and permanent aspects, and briefly state common reasons like food or breeding.

Question (b) Describe the life cycle of birds.
Answer: Birds lay eggs. The eggs are hatched, and after a few days, small birds come out. They grow up in the nest, cared for by their parents. After three-four weeks, they become an adult bird and start laying eggs, continuing the cycle.
In simple words: Birds start as eggs, hatch into small birds, grow in the nest, and then become adults that lay their own eggs.

🎯 Exam Tip: When describing a life cycle, ensure you cover all key stages from birth/egg to adulthood and reproduction in a sequential manner.

Question (c) Give two causes of air pollution.
Answer: The two causes of air pollution are as follows:
1. Fuels are burnt in vehicles, giving out certain poisonous gases and smoke, which significantly degrade air quality.
2. Industries let out some poisonous gases into the air, contributing to smog and respiratory issues.
In simple words: Air pollution is mainly caused by vehicles burning fuel and factories releasing harmful gases into the atmosphere.

🎯 Exam Tip: When listing causes, provide specific examples like vehicle emissions and industrial discharge to demonstrate understanding.

Question (d) For what purpose do we use land obtained by clearing forests?
Answer:
In simple words: (Answer content not provided in the source material.)

🎯 Exam Tip: (Answer content not provided in the source material.)

Give Reasons:

Question (a) It is important to conserve the living components of the environment.
Answer: It is important to conserve the living components of the environment because:
1. Due to human intervention in nature the non living components are getting polluted.
2. So the living things are threatened.
3. Several living things have already become extinct.
4. If one factor of the environment is damaged, it disturbs environmental balance.
5. The process of extinction is increasingly fast.
6. This will be a threat to the whole living world. Protecting these components ensures the long-term health and stability of our planet.
In simple words: It's crucial to protect living things because human actions are harming the environment, causing many species to disappear and disrupting the natural balance, which threatens all life.

🎯 Exam Tip: When asked to 'Give reasons', always provide multiple distinct points to show a comprehensive understanding of the topic.

Question (b) The numbers of wild animals are falling day by day.
Answer:
1. Forests have been cut down to make place for various reasons of man's need.
2. Forest provide shelter and food to the wild animals.
3. If the plants on the earth are destroyed the number of animals also fall day by day.
4. Because of hunting, the population of wild animals is falling. This decline highlights the urgent need for conservation efforts and habitat protection.
In simple words: Wild animal populations are decreasing because forests, their homes and food sources, are being destroyed for human needs, and also due to hunting.

🎯 Exam Tip: When explaining population decline, focus on both habitat loss and direct human impact like hunting.

True Or False:

Question (a) Dead plants and animals are a biotic components.
Answer: True. Even after death, their remains contribute to the biotic cycle of an ecosystem.
In simple words: This statement is True. Dead plants and animals are considered biotic components because they were once alive and are made of organic material.

🎯 Exam Tip: Remember that biotic components include all living organisms and their remains, while abiotic components are non-living physical and chemical factors.

Question (b) It is necessary to conserve biodiversity.
Answer: True.
In simple words: Protecting the variety of life on Earth, like different plants and animals, is very important for our planet's health.

🎯 Exam Tip: When answering true/false questions, clearly state 'True' or 'False' and be prepared to briefly explain why if asked.

6. Classify The Following As Natural Or Man-Made

Question 1. Classify the following as natural or man-made: Soil, horse, stone, water hyacinth, book, sunlight, dolphin, pen, chair, water, cottonwool, table, trees, brick.
Answer: Natural – horse, water hyacinth, sunlight, dolphin, water, trees, cottonwool. Manmade – soil, stone, book, pen, chair, table, brick. Understanding this distinction helps us appreciate our environment.
In simple words: Natural things are found in nature, while man-made things are created by people.

🎯 Exam Tip: For classification questions, list items clearly under each category. Double-check each item to ensure it's placed correctly.

Environmental Studies Part 1 Standard 5th Solutions Chapter 18 The Environment And Us Additional Important Questions And Answers

Fill In The Blanks With The Correct Answers From The Options Given Below:

Question 1. The population of the world is now close to hundred crore.
(a) four
(b) five
(c) six
Answer: (c) six
In simple words: The number of people living in the world is currently around six hundred crore.

🎯 Exam Tip: For fill-in-the-blank questions with options, read the sentence carefully and choose the option that makes the most sense in context.

Question 2. Tremendous quantities of ............ enter the air due to burning of fuels.
(a) oxygen

🎯 Exam Tip: When answering fill-in-the-blank questions, consider the context of the sentence to determine the most appropriate word or phrase.

Question 3. The .......................... sanctuary is known for bisons.
(a) Radhanagari
(b) Tadoba
(c) Kaziranga
Answer: (a) Radhanagari
In simple words: Radhanagari is a famous wildlife sanctuary specifically known for protecting bisons.

🎯 Exam Tip: Remember specific sanctuaries and the animals they protect for general knowledge questions. Knowing the location of such sanctuaries can also be helpful.

Question 4. .......................... state has declared the Nannaj area a sanctuary for the Great Indian Bustard.
(a) Maharashtra
(b) Madhya Pradesh
(c) Meghalaya
Answer: (a) Maharashtra
In simple words: Maharashtra is the state that has officially designated the Nannaj area as a protected sanctuary for the Great Indian Bustard, a critically endangered bird.

🎯 Exam Tip: Know which states are associated with specific wildlife sanctuaries and endangered species, as these are common facts tested in exams.

Question 5. In Madhya Pradesh, Devrais are known as .......................... .
(a) Devran
(b) Sharanvan
(c) Sharanrais
Answer: (b) Sharanvan
In simple words: In the state of Madhya Pradesh, the sacred groves, which are traditionally known as Devrais, are also referred to as Sharanvan.

🎯 Exam Tip: Be aware of regional variations in names for similar ecological or cultural concepts, especially when studying traditional practices or geography.

Question 6. Masrhy or low-lying areas are filled to .......................... the land.
(a) rebuild
(b) reclaim
Answer: (b) reclaim
In simple words: When marshy or low-lying areas are filled with earth to make them suitable for use, this process is called reclaiming the land.

🎯 Exam Tip: Understand the meaning of terms like 'reclaim' in the context of land management and environmental science, as it describes making unusable land productive again.

Question 7. There are many types of .................... in forests.
(a) plants
(b) rivers
(c) dams
Answer: (a) plants
In simple words: Forests are mainly known for their many different kinds of plants, which form the core of their ecosystem.

🎯 Exam Tip: When filling in the blanks, consider the primary characteristic or component of the subject mentioned, like plants for forests.

Question 8. Birds build their nests in .................... .
(a) shrubs
(b) bushes
(c) trees
Answer: (c) trees
In simple words: Birds often choose trees to build their nests because trees offer height, shelter, and protection from predators.

🎯 Exam Tip: Think about the most common and safest places birds choose for nesting to identify the correct option.

Question 9. Water sources get .................... if waste water is let into them without processing.
(a) polluted
(b) clogged
(c) depleted
Answer: (a) polluted
In simple words: When untreated waste water enters water sources, it introduces harmful substances, making the water dirty and unsafe, which is called pollution.

🎯 Exam Tip: Understand the direct consequence of releasing untreated waste into water bodies; pollution is the most immediate and significant impact.

Question 10. .................... water is also given out from factories into their surroundings.
(a) Waste
(b) Running
(c) Stagnant
Answer: (a) Waste
In simple words: Factories often produce water that is no longer useful or contains harmful chemicals, which is then released as waste water.

🎯 Exam Tip: Consider the type of water factories typically discharge; it's usually water that has been used in processes and is no longer clean, hence 'waste' water.

Question 11. If water from such polluted sources keeps soaking into the soil, it becomes
(a) fertile
(b) infertile
(c) marshy
Answer: (b) infertile
In simple words: When polluted water soaks into the soil, it harms the soil, making it unable to grow plants well.

🎯 Exam Tip: Remember that pollution generally has negative effects on natural resources like soil and water, often making them unusable or harmful.

Question 12. Chemical fertilizers and pesticides are used on a large scale for
(a) Horticulture
(b) Vermiculture
(c) Agriculture
Answer: (c) Agriculture
In simple words: Farmers use chemical fertilizers to help crops grow and pesticides to protect them from pests, which are common practices in agriculture.

🎯 Exam Tip: Distinguish between different farming practices; agriculture focuses on crop production, often involving large-scale use of chemicals.

Question 13. __________ is used in all homes.
(a) Fuel
(b) Coal
(c) Kerosene
Answer: (a) Fuel
In simple words: Every home uses some form of fuel for cooking, heating, or other energy needs, whether it's gas, electricity, or wood.

🎯 Exam Tip: Think broadly about common household necessities; fuel is a fundamental requirement for various daily activities in homes.

Question 14. There are big industries and factories in which ........... is used in great quantities.
(a) water
(b) smoke
(c) fuel
Answer: (c) fuel
In simple words: Large industries and factories need a lot of fuel to power their machines and processes, which consume energy on a massive scale.

🎯 Exam Tip: Consider the energy demands of large-scale industrial operations; fuel is essential for running machinery and production processes.

Question 15. When the proportion of carbon dioxide in the air rises, it leads to rise in .......................... .
(a) rain
(b) temperature
(c) pollution
Answer: (b) temperature
In simple words: An increase in carbon dioxide traps more heat in the atmosphere, causing the Earth's overall temperature to go up, which is known as global warming.

🎯 Exam Tip: Remember that carbon dioxide is a greenhouse gas, and its increased concentration directly contributes to the rise in global temperature.

Question 16. When fuels are burnt in vehicles, they give out certain .......................... gases as well as smoke.
(a) poisonous
(b) polluted
(c) natural
Answer: (a) poisonous
In simple words: Burning fuels in cars releases harmful and toxic gases into the air, which are dangerous for living beings and the environment.

🎯 Exam Tip: When discussing vehicle emissions, keywords like 'poisonous', 'toxic', or 'harmful' are crucial to describe the nature of the gases released.

Question 17. Industries also let out some .......................... gases into the air.
(a) poisonous
(b) polluted
(c) natural
Answer: (a) poisonous
In simple words: Factories and industries release dangerous and harmful gases as byproducts of their processes, which contaminate the air.

🎯 Exam Tip: Industrial emissions are a major source of air pollution, and the gases released are often toxic and detrimental to health and the environment.

Question 18. Due to human .......................... in nature, large scale changes are taking place in air, water and land.
(a) interval
(b) intervention
(c) invention
Answer: (b) intervention
In simple words: When humans interfere with or change natural processes, it leads to significant alterations in the environment, affecting air, water, and land.

🎯 Exam Tip: 'Intervention' refers to human actions that affect natural systems, often leading to environmental consequences, distinguishing it from 'invention' (creating something new) or 'interval' (a period of time).

Question 19. From time to time, some of the living things on the earth become .......................... .

Question 20. Food, water and clothes are the ............... of all people.
(a) basics
(b) needs
(c) pollution
Answer: (b) needs
In simple words: Food, water, and clothes are fundamental requirements for everyone to live and survive.

🎯 Exam Tip: When identifying basic necessities, think about what humans absolutely cannot live without. These are often referred to as 'needs'.

Question 21. We need to take steps to prevent the ............... of the environment.
(a) degradation
(b) pollution
(c) conservation
Answer: (a) degradation
In simple words: Degradation means the process of something getting worse or being damaged, which is what we need to prevent for our environment.

🎯 Exam Tip: Understand the subtle differences between terms like 'degradation', 'pollution', and 'conservation'. Degradation refers to the overall decline in quality, while pollution is a specific cause of degradation, and conservation is the act of protecting. Choose the most comprehensive term that fits the context.

Question 22. Let us all ensure that no action on our part will cause ............... or cause harm to living things.
(a) conservation
(b) intervention
(c) pollution
Answer: (c) pollution
In simple words: Pollution is the introduction of harmful substances into the environment, which directly causes harm to living things.

🎯 Exam Tip: The phrase "cause harm to living things" directly points to the negative impact of pollution. Conservation is protection, and intervention is getting involved, neither of which directly cause harm in this context.

Question 23. Let us make all possible efforts for the ............... of the living world.
(a) conservation

🎯 Exam Tip: For fill-in-the-blanks, consider the overall positive or negative tone of the sentence. "Making efforts for the living world" implies a positive action like conservation.

Question 24. Several projects are being implemented at the international level to .......................... the balance of nature.
(a) mountain
(b) maintain
(c) destroy
Answer: (b) maintain
In simple words: Projects are put in place globally to keep the natural world balanced and healthy.

🎯 Exam Tip: When filling in blanks related to environmental efforts, look for words that suggest preservation or upkeep, as projects are usually designed to help, not harm.

Question 25. It is important to raise the awareness of people all over the world about the .......................... to environmental balance.
(a) threat
(b) reservation
(c) treat
Answer: (a) threat
In simple words: People need to know about the dangers that can harm the environment's balance.

🎯 Exam Tip: Awareness campaigns typically highlight problems or dangers, so 'threat' is the most fitting word in the context of environmental balance.

Question 26. In 'biodiversity park', biodiversity is both preserved and .......................... .
(a) memorized
(b) studied
(c) destroyed
Answer: (b) studied
In simple words: Biodiversity parks not only protect different kinds of life but also allow scientists and visitors to learn about them.

🎯 Exam Tip: Biodiversity parks serve a dual purpose: conservation (preserving) and education/research (studying). Remember both aspects.

Question 27. People visiting 'biodiversity park', enjoy being close to .......................... .
(a) parks
(b) grass
(c) nature
Answer: (c) nature
In simple words: Visitors to a biodiversity park get to experience and enjoy the natural environment and its living things.

🎯 Exam Tip: 'Nature' is the broadest and most encompassing term for the environment and living organisms found in a biodiversity park.

Question 28. Some areas which are important for the protection and conservation of wild life are for them.
(a) revered
(b) reserved
(c) protected
Answer: (b) reserved
In simple words: Certain places are set aside specifically to keep wild animals and plants safe from harm, ensuring they can live and grow without disturbance.

🎯 Exam Tip: Remember that 'reserved' areas are specifically designated for conservation, distinguishing them from general 'protected' areas which might have broader uses.

Question 29. If the plants on the earth are destroyed the numbers of also fall.
(a) humans
(b) trees
(c) animals
Answer: (c) animals
In simple words: Plants are the base of the food chain; if they disappear, animals that eat plants, and animals that eat those animals, will also suffer and their numbers will decrease.

🎯 Exam Tip: Understand the concept of a food chain or ecosystem. The destruction of one level (producers like plants) directly impacts the levels above it (consumers like animals).

Question 30. If deforestation is stopped, and instead tree plantation is stepped up, animals that depend on plants will get protection and .
(a) thrive
(b) threat
(c) deplete
Answer: (a) thrive
In simple words: When forests are saved and new trees are planted, animals get their homes and food back, allowing them to grow strong and increase in number.

🎯 Exam Tip: Focus on the positive impact of conservation efforts. 'Thrive' implies growth and well-being, which is the natural outcome of a healthy habitat for animals.

Question 31. lake has formed due to a dam built on the Chand river in Satara district.
(a) Victoria
(b) Mayani
(c) Tulsi

Question 32. __________ from the Siberia region in northern Asia migrate to this lake.
(a) Deer
(b) Bison
(c) Flamingos
Answer: (c) Flamingos
In simple words: Flamingos are known to travel long distances from Siberia to warmer regions like Mayani lake for feeding and breeding.

🎯 Exam Tip: Remember key migratory bird species and their common migration routes or destinations for general knowledge questions.

Question 33. Mayani lake has been declared a __________ for birds.
(a) sanctuary
(b) conservatory
(c) threat
Answer: (a) sanctuary
In simple words: A sanctuary is a protected area where birds and other wildlife can live safely without being disturbed.

🎯 Exam Tip: Understand the difference between terms like 'sanctuary', 'conservatory', and 'reserve' in the context of wildlife protection.

Question 34. People believe that a Devrai is really a jungle reserved for __________.
(a) us
(b) god
(c) people
Answer: (b) god
In simple words: A Devrai is a sacred grove, a patch of forest traditionally protected by local communities out of religious belief, often dedicated to a deity.

🎯 Exam Tip: Learn about traditional conservation practices like 'Devrai' (sacred groves) and their cultural significance.

Question 35. Devrais give __________ not only to the plants but also to the animals that live there.
(a) shelter
(b) food
(c) clothing
Answer: (a) shelter
In simple words: Devrais, being dense forests, provide a safe home and protection for various plants and animals.

🎯 Exam Tip: Understand the ecological role of forests and natural habitats in providing shelter and resources for biodiversity.

Question 2. State whether the following statements are True or False:
1. Pollution of water is a threat to aquatic plants and animals.
2. Nature provides enough for every man's greed, but not for every man's need.
3. The Maldhok is also called the Great Indian Bustard.
4. Marshy or low lying areas are filled to reclaim the land.
5. Man is also a part of nature.
Answer:
1. True
2. False
3. True
4. True
5. False
In simple words: This question tests your understanding of basic environmental facts and the relationship between humans and nature.

🎯 Exam Tip: For True/False questions, carefully evaluate each statement based on your knowledge of the subject. A single incorrect detail makes the entire statement false.

Name The Following

Question 1. Two National Parks.
Answer: Kaziranga National Park and Tadoba National Park. These parks are vital for preserving India's diverse wildlife.
In simple words: The question asks for two national parks, and the answer provides two well-known examples.

🎯 Exam Tip: When asked to name specific examples, ensure you provide accurate and relevant names. Knowing a few key examples for common categories is always beneficial.

Question 2. Lake built on the Chand river in Satara.
Answer: Mayani. This lake is an important local landmark and a habitat for various bird species.
In simple words: The lake constructed on the Chand river in Satara is known as Mayani.

🎯 Exam Tip: Pay close attention to specific geographical details like river names and locations when answering such questions.

Question 3. Birds which migrate to Asia from Siberia.
Answer: Flamingo. Flamingos are renowned for their impressive long-distance migratory patterns across continents.
In simple words: Flamingos are the birds that travel from Siberia to Asia as part of their migration.

🎯 Exam Tip: Remember key examples of migratory birds and their common migration routes for general knowledge questions about wildlife.

Question 4. The biggest Maldhok sanctuary in Asia.
Answer: Nannaj in Solapur district is home to the biggest Maldhok sanctuary in Asia, playing a crucial role in conserving this endangered bird.
In simple words: The largest Maldhok sanctuary in Asia is located in Nannaj, Solapur district.

🎯 Exam Tip: When asked for specific locations or names, ensure you provide the exact name and associated geographical detail for full marks.

Question 5. State known for Devrais.
Answer: Maharashtra is widely known for its Devrais, which are sacred groves protected by local communities.
In simple words: Maharashtra is the state famous for its Devrais, which are sacred forests.

🎯 Exam Tip: Remember that "Devrais" are sacred groves, and associating them with Maharashtra is a key fact for this type of question.

Question 6. Village famous for peacock population
Answer: Morachi Chincholi is a village renowned for its thriving peacock population, attracting many visitors.
In simple words: Morachi Chincholi is a village known for having many peacocks.

🎯 Exam Tip: When asked about specific places known for particular animals, state the village name clearly.

Answer In One Sentence:

Question 1. What is a biodiversity park?
Answer: An area which is reserved for the purpose of protecting and conserving the biodiversity of a region is called a biodiversity park, helping to preserve various forms of life.
In simple words: A biodiversity park is an area set aside to protect and save the different types of plants and animals in a region.

🎯 Exam Tip: Define "biodiversity park" by highlighting its core purpose: protecting and conserving the region's biodiversity.

Question 2. What are national parks?
Answer: Some areas reserved for the protection and conservation of wildlife are called national parks, ensuring the survival of various species.
In simple words: National parks are special areas created to protect and save wild animals and plants.

🎯 Exam Tip: When defining national parks, emphasize their role in protecting and conserving wildlife.

Question 3. What is a sanctuary?
Answer: Certain forest areas are reserved for the protection and conservation of a particular animal or plant, and it is called a sanctuary, providing a safe habitat for specific species.
In simple words: A sanctuary is a forest area protected to save a specific type of animal or plant.

🎯 Exam Tip: Distinguish a sanctuary by noting its focus on protecting a *particular* animal or plant, rather than general biodiversity.

Question 4. What are Devrai?
Answer: In Indian culture, people believe that a jungle is reserved for god which is known as Devrai. These sacred groves play an important role in preserving local biodiversity.
In simple words: Devrai are special forests in India that people believe are for gods, helping protect nature.

🎯 Exam Tip: When defining cultural terms, always include the core belief and its significance.

Question 5. Which trees are commonly looked after for birds in Morachi Chincholi?
Answer: Tamarind trees are commonly looked after for birds in Morachi Chincholi. These trees provide essential shelter and food for the peacock population.
In simple words: In Morachi Chincholi, tamarind trees are protected because many birds, especially peacocks, live there.

🎯 Exam Tip: Remember specific examples like 'Tamarind trees' and 'Morachi Chincholi' for questions about local conservation efforts.

Question 6. What is the population of the world?
Answer: The population of the world is now close to six hundred crore. This number continues to grow, posing challenges for resource management.
In simple words: The world's population is nearly six hundred crore, which is a very large number of people.

🎯 Exam Tip: For factual questions about global statistics, provide the approximate figure as stated in the text.

Question 7. Why is man using up more and more land and water resources?
Answer: Man is developing new technology to meet the needs of all the people, so man is using more and more land and water resources. This increased consumption is driven by population growth and rising living standards.
In simple words: People are using more land and water because new technology helps them meet the growing needs of everyone.

🎯 Exam Tip: When explaining resource consumption, link it to both technological advancement and population needs.

Question 8. What happens if forests are reduced?
Answer: If forests are reduced, biodiversity is also depleted. This loss of biodiversity can disrupt ecosystems and impact many species.
In simple words: When forests shrink, many different kinds of plants and animals also decrease, harming nature.

🎯 Exam Tip: Always connect deforestation directly to the loss of biodiversity as a key consequence.

Question 9. How do water sources get polluted?
Answer: Water sources get polluted if waste water is let into them without processing. Untreated wastewater contains harmful substances that contaminate natural water bodies.
In simple words: Water gets dirty when dirty water from homes or factories is put into it without being cleaned first.

🎯 Exam Tip: Focus on 'untreated wastewater' as the primary cause of water pollution for this type of question.

Question 10. What happen when water from polluted sources keep soaking into the soil?

🎯 Exam Tip: When discussing environmental impacts, consider the long-term effects on soil and groundwater quality.

Question 11. What happens when the proportion of carbon dioxide in the air rises?
Answer: When the proportion of carbon dioxide in the air rises, it leads to rise in temperature. This increase in temperature is often referred to as global warming.
In simple words: More carbon dioxide in the air makes the Earth hotter.

🎯 Exam Tip: Remember that an increase in carbon dioxide is a major cause of global warming, a key environmental issue.

Question 12. How is the environmental balance disturbed?
Answer: If one factor of the environment is damaged, its relationships with other factors also get affected. This interconnectedness means that even a small change can have widespread effects. Thus the environmental balance is disturbed.
In simple words: When one part of nature is harmed, it affects all the other parts, upsetting the natural balance.

🎯 Exam Tip: Focus on the "interconnectedness" of environmental factors when explaining how balance is disturbed.

Question 13. What steps can be taken to prevent the degradation of the environment?
Answer: We must use our means frugally and recycle used articles, if every person practices this sincerely then we can prevent degradation of the environment. Adopting sustainable practices is crucial for long-term environmental health.
In simple words: To protect the environment, we should use resources carefully and recycle things, which helps reduce waste.

🎯 Exam Tip: Key actions for environmental protection include 'frugal use' (conservation) and 'recycling'.

Question 14. What happens when deforestation is stopped and tree plantation is stepped up?
Answer: If deforestation is stopped and instead tree plantation is stepped up, animals that depend on plants will get protection and thrive. This also helps in maintaining biodiversity and improving air quality.
In simple words: Stopping tree cutting and planting more trees helps animals that live on plants and makes the environment healthier.

🎯 Exam Tip: Emphasize the dual benefits: protecting animals and improving the overall ecosystem.

Question 15. How is the Mayani lake helpful to migratory birds?
Answer: Mayani lake homes flamingos from Siberia who migrate to this lake. Here they build nests, lay eggs and when the baby bird grows big enough they return with them to Siberia. This lake provides a vital breeding ground and a safe haven for these long-distance travelers.
In simple words: Mayani lake is a safe place for flamingos from Siberia to build nests, lay eggs, and raise their young before flying back home.

🎯 Exam Tip: When describing the importance of a habitat, mention specific activities like nesting, breeding, and providing shelter.

Question 16. What steps has the Maharashtra State government taken to protect the Great Indian Bustard?
Answer: (The specific steps taken by the Maharashtra State government to protect the Great Indian Bustard are not provided in the given text.)
In simple words: The information about the government's actions to protect the Great Indian Bustard is not available in this text.

🎯 Exam Tip: When asked about government initiatives, remember to mention specific programs, sanctuaries, or legal protections if known.

Question 17. The environment is being degraded rapidly.
Answer: (a) Man fulfil his needs by using materials from environment. (b) All the people in the world have similar needs and desires. (c) So, the environment is being degraded rapidly. This continuous demand puts a lot of pressure on natural resources.
In simple words: The environment is degrading because people use many resources to meet their needs and desires, which are similar for everyone.

🎯 Exam Tip: When explaining environmental degradation, link human needs and desires directly to resource consumption and its impact.

Question 18. Flamingos have stopped coming to Mayani Lake.
Answer: 1. Flamingos used to migrate from Silbeia to Mayani lake to build their nests and lay eggs. 2. In the recent past, the water level in the dam has fallen. 3. Therefore, the flamingos have stopped coming to Mayani lake. The lack of sufficient water makes the habitat unsuitable for them.
In simple words: Flamingos stopped coming to Mayani Lake because the water level dropped, making it impossible for them to build nests and lay eggs, which they used to do after migrating.

🎯 Exam Tip: For questions about animal migration or habitat changes, always mention the specific reason related to their needs (like water for nesting) and the environmental change.

Question 19. The Indian Bustard are the farmers' friend.
Answer: 1. The Indian Bustard live in open grasslands. 2. They feed on insects thus giving protection to crops in fields. 3. Therefore, they are the farmers' friend. Their diet naturally helps control pests, benefiting agriculture.
In simple words: Indian Bustards are friends to farmers because they live in grasslands and eat insects, which protects the crops from pests.

🎯 Exam Tip: When asked about the relationship between animals and humans, focus on the beneficial actions or ecological roles the animal plays.

Answer Briefly

Question 1. Give two causes of water pollution.
Answer: The two causes of water pollution are as follows: 1. Waste water given out from factories are let into water bodies without processing. This untreated discharge introduces harmful chemicals into the water.
In simple words: One major cause of water pollution is factories releasing dirty water directly into rivers and lakes without cleaning it first.

🎯 Exam Tip: When listing causes of pollution, be specific about the source (e.g., factories) and the type of pollutant (e.g., waste water, untreated chemicals).

2. Chemical fertilizers and pesticides are used in agriculture which seep into the soil and finally flow into rivers with rainwater.

Can You Tell?

(A) With the help of the questions below, explain what would happen if forests are cleared on a large scale.

Question 1. Will water and food sources for living things grow or dwindle? Why?
Answer: If forests are cleared the amount of rain will become less and the amount of food required will dwindle. This reduction directly impacts the survival and well-being of all living creatures.
In simple words: Clearing forests means less rain and less food, causing resources for living things to shrink.

🎯 Exam Tip: When explaining environmental impacts, always link the cause (deforestation) to direct effects (less rain, less food) and their consequences for living things.

Question 2. Will the living things look for shelters elsewhere or stay on? Why?
Answer: The living things will look for shelter elsewhere if forest is cleared because forest is their home. They are forced to relocate when their natural habitat is destroyed.
In simple words: Animals will leave cleared forests to find new homes because their original habitat is gone.

🎯 Exam Tip: Remember that forests are natural habitats; their destruction forces animals to migrate, often leading to loss of life or conflict with human settlements.

Question 3. Will the space occupied by the plants and animals increase or decrease? Why?
Answer: The space occupied by the plants and animals will decrease because forest that is cleared will be used for other purpose. This loss of space reduces biodiversity and natural ecosystems.
In simple words: The area for plants and animals will shrink because cleared forests are used for human activities.

🎯 Exam Tip: Focus on the direct consequence of deforestation: reduction of habitat, which directly leads to a decrease in the space available for flora and fauna.

Question 4. Will the number of living things increase or decrease? Why?
Answer: The number of living things will decrease because forest provides food, shelter and water. Without these essential resources, many species cannot survive or reproduce effectively.
In simple words: The number of living things will go down because forests provide them with food, shelter, and water, which are vital for survival.

🎯 Exam Tip: Emphasize the critical role of forests in providing basic necessities (food, shelter, water) for life, explaining why their removal leads to population decline.

(B)

Question 1. What could be the reasons of air pollution?
Answer: The reasons of air pollution are increasing use of vehicles and growth of industries. These factors release harmful substances into the atmosphere.
In simple words: Air pollution happens because more cars are used and more factories are built, which put bad stuff into the air.

🎯 Exam Tip: When asked for reasons, list specific causes clearly and concisely.

Question 2. What are the different purposes for which fuels such as petrol, diesel, kerosene, natural gas, coal and wood are used?
Answer: Petrol and diesel are used in vehicles. Kerosene is used in stoves. Natural gas is used for cooking. Coal and wood are used for burning. Each fuel serves a distinct purpose in our daily lives, from transportation to heating.
In simple words: Different fuels like petrol, diesel, kerosene, natural gas, coal, and wood are used for various things such as running cars, cooking food, and heating.

🎯 Exam Tip: When listing uses for multiple items, ensure each item is clearly matched with its specific purpose.

Question (C) You see a food chain in the picture above. One of the links is missing. What effect will it have on the grasshopper? On the bird? What picture should there be in the blank space? If this living thing really died out, what would be the threat to the entire living worlds? Discuss your answers in the class.

• Grass
• Grasshopper
• Bird

Answer: Grass is missing. If grass is not there then the number of grasshoppers will become less or even become extinct. Birds will not get enough food and become less or may even extinct. This illustrates the delicate balance within an ecosystem, where the loss of one species can have cascading effects.
In simple words: If grass disappears, grasshoppers won't have food and will die out. Then, birds that eat grasshoppers will also starve and disappear, showing how important each part of a food chain is.

🎯 Exam Tip: When analyzing food chains, identify producers, primary consumers, and secondary consumers, and explain the impact of removing any link.

Glossary

• biodiversity -variety of plant and animal life in a particular habitat
• deforestation – clearing/cutting of forests or trees.

3. depleted – reduced
4. frugally - sparingly
5. degradation – breaking down.
6. components – parts
7. intervention - interference
8. extinction – non-existence.
9. dwindle diminish gradually.

Class 5 Environmental Studies Questions And Answers: