CBSE Class 6 Social Science Oceans and Continents Assignments Set A

Give reason.

Question. Why is the Earth called the "blue planet"?
Answer: The Earth is called the "blue planet" because the majority of its surface is covered by water, which reflects blue light.

Question. Why did United Nations designed as World Ocean day?
Answer: The United Nations designated June 8 as World Oceans Day to raise awareness about the importance of oceans and the challenges they face, and to promote sustainable practices for ocean conservation.

Give One Word Answer.

Question. The largest ocean on Earth. - ________________
Answer: Pacific Ocean

Question. The largest island in the world. - ________________
Answer: Greenland

Question. A huge destructive wave from the ocean. - ________________
Answer: Tsunami

Question. A continent is located at the southernmost part of the world. - ________________
Answer: Antarctica

Question. A major source of pollution of the oceans. - ________________
Answer: Plastic

Answer in words.

Question. Name the Continents.
Answer: Asia, Africa, North America, South America, Antarctica, Europe

Question. Give names of India’s two major groups of Islands.
Answer: Andaman and Nicobar Islands, Lakshadweep Islands

Question. Name the oceans that lies in northern hemisphere.
Answer: Arctic Ocean, Atlantic Ocean, Pacific Ocean

Very Short Answer Questions

Question. Why is ocean water unfit for consumption by humans?
Answer: The oceans together hold most of the water available but the seawater is unfit for consumption because it is salty.

Question. Which continent is known for its extreme cold climate and research stations?
Answer: Antarctica

Question. When did we celebrate World Ocean Day every year?
Answer: 8th June every year.

Question. What are the two important parts of the Indian Ocean on either side of India?
Answer: Arabian Sea and Bay of Bengal.

Question. Why did oceans’ flora called “the planet’s lungs”?
Answer: Because more than half of the world’s oxygen is produced by the oceans’ flora.

Question. What are the main limits of the Indian Ocean?
Answer: The main limits of the Indian Ocean are:
Asia to the north, Africa to the west, Australia to the east Southern Ocean in the South.

Question. What is the Indian Navy's motto?
Answer: "Sam noh Varunah."

Question. What role do clouds play in the water cycle?
Answer: They bring rain to the continents.

Question. What major natural disaster can tsunamis be triggered by?
Answer: Earthquakes.

Question. When is United Nations (UN) designation of World Oceans Day?
Answer: June 8th

Question. What would be happen if there is no ocean on the Earth?
Answer: a. There would be no Rainfall.
b. The Earth would be Desert.

Question. What system helps detect tsunamis before they reach the coast?
Answer: Early warning system

Question. Which hemisphere holds more water?
Answer: Northern hemisphere.

Question. What system helps detect tsunamis before they reach the coast?
Answer: Early warning system.

Question. What are Continents?
Answer: A large body of land is called a ‘landmass’, and a large continuous expanse of land is called a ‘continent’.

Question. What is the largest island in the world?
Answer: Greenland

Question. What means NDMA?
Answer: National Disaster Management Authority.

Question. What environmental issue is caused by human activities in oceans?
Answer: Pollution.

Question. What means Marine Flora?
Answer: The marine flora includes tiny plants called algae and all kinds of seaweeds.

Question. Which two continents are often grouped together as 'Eurasia'?
Answer: Europe and Asia.

Question. Name the fve major oceans.
Answer: Pacifc, Atlantic, Indian, Arctic, Southern.

Question. Which island is known as the largest in the world?
Answer: Greenland is considered as the largest island in the world.

Question. On what date is World Oceans Day celebrated?
Answer: June 8

Question. Why would the Earth be a desert without oceans?
Answer: The Earth would become a desert without oceans because clouds, which are essential for rainfall, form over the oceans

Short Answer Questions

Question. Why is the Earth called the 'blue planet'?
Answer: The Earth is referred to as the 'blue planet' because a significant portion of its surface, nearly three-fourths, is covered with water. This water, primarily in the form of vast oceans like the Pacific and Atlantic, imparts a distinct blue color when viewed from space. This blue appearance was notably observed by early astronauts. The dominance of water not only defines the planet’s color but also influences its climate and sustains various forms of life, justifying the nickname given by those who first observed it from afar.

Question. What are oceans and how much of the Earth do they cover?
Answer: Oceans are large bodies of saltwater that dominate the Earth's surface, including the Pacific, Atlantic, and Indian Oceans. They cover nearly three-fourths of the Earth's surface, leaving just over one-fourth covered by land. The oceans are interconnected systems without real separations, playing a crucial role in climate regulation, supporting diverse marine life, and facilitating global water cycles.

Question. Why do oceans and continents affect climate and life?
Answer: Oceans and continents significantly influence Earth's climate and life forms by regulating temperatures, weather patterns, and ecosystems.
Oceans cover three-fourths of the planet and are primary producers of oxygen through marine plants. They affect weather systems, including precipitation patterns such as the monsoons.
Continents receive these weather influences, supporting diverse biological ecosystems and human populations by providing varied climates and habitats.

Question. What are tsunamis, and how do they affect coastal areas?
Answer: Tsunamis are large, powerful ocean waves typically triggered by underwater earthquakes or volcanic eruptions. These waves can travel at high speeds across ocean basins and cause devastating flooding when they reach coastal areas. Tsunamis can lead to significant loss of life and property, as demonstrated by the 2004 Indian Ocean tsunami, which resulted in over two hundred thousand fatalities and extensive damage along affected coastlines.

Question. Why can the number of continents vary between four and seven?
Answer: The number of recognized continents can vary due to different geographical and cultural conventions. Commonly, seven continents are recognized: Africa, Antarctica, Asia, Australia, Europe, North America, and South America. However, some models merge Europe and Asia into a single continent called Eurasia or combine North and South America, reducing the count. These variations reflect historical, cultural, and geographical interpretations of the Earth's major landmasses.

Question. How do oceans impact life on Earth?
Answer: Oceans impact life on Earth in numerous ways:
• They provide a source of food and resources.
• They regulate the Earth's climate.
• They support transportation and trade.
• They influence weather patterns.
• They offer recreational opportunities.

Question. What was the 2004 Indian Ocean tsunami, and how did it affect India?
Answer: The 2004 Indian Ocean tsunami was a devastating event caused by a massive earthquake off the coast of Sumatra, Indonesia. It resulted in widespread destruction and loss of life in countries around the Indian Ocean, including India. The tsunami caused severe damage to coastal infrastructure, displaced millions of people, and had a long-lasting impact on the affected regions.

Question. What are the main landmasses that border the Indian Ocean?
Answer: The main landmasses that border the Indian Ocean are Asia, Africa, Australia and Antarctica.

Long Answer Questions

Question. Discuss how oceans can be both beneficial and destructive, with examples.
Answer: Beneficial Aspects:
• Climate Regulation: Oceans regulate the Earth's climate by circulating heat and moisture around the globe. They are instrumental in precipitation patterns, influencing weather systems such as monsoons.
• Biodiversity: Oceans are home to a vast array of species, from tiny plankton to large whales, supporting complex ecosystems that contribute to global biodiversity.
• Economic Resources: They provide essential resources, including food through fisheries and minerals from the ocean floor.
Destructive Aspects:
• Storms and Hurricanes: Oceans generate severe weather patterns, including hurricanes and cyclones, which can cause extensive damage to coastal communities and ecosystems.
• Tsunamis: Triggered by underwater earthquakes, tsunamis can lead to catastrophic loss of life and property, as illustrated by the 2004 Indian Ocean tsunami.
• Conclusion: While oceans are vital to sustaining life and supporting global economies, their destructive potential through natural disasters poses significant challenges that require effective management and mitigation strategies.