CBSE Class 4 School Holiday Homework Worksheet Set 08

Question 1. Write first 8 digits of any 5 mobile numbers and write them in Indian and International system of numeration.
Answer: Let us take 5 sample 10-digit mobile numbers and examine their first 8 digits:
1. Number: 9876543210 - First 8 digits: 98765432
- Indian System: 9,87,65,432 (Nine crore eighty-seven lakh sixty-five thousand four hundred thirty-two)
- International System: 98,765,432 (Ninety-eight million seven hundred sixty-five thousand four hundred thirty-two)
2. Number: 9123456789 - First 8 digits: 91234567
- Indian System: 9,12,34,567 (Nine crore twelve lakh thirty-four thousand five hundred sixty-seven)
- International System: 91,234,567 (Ninety-one million two hundred thirty-four thousand five hundred sixty-seven)
3. Number: 9988776655 - First 8 digits: 99887766
- Indian System: 9,98,87,766 (Nine crore ninety-eight lakh eighty-seven thousand seven hundred sixty-six)
- International System: 99,887,766 (Ninety-nine million eight hundred eighty-seven thousand seven hundred sixty-six)
4. Number: 9000111222 - First 8 digits: 90001112
- Indian System: 9,00,01,112 (Nine crore one thousand one hundred twelve)
- International System: 90,001,112 (Ninety million one thousand one hundred twelve)
5. Number: 9555444333 - First 8 digits: 95554443
- Indian System: 9,55,54,443 (Nine crore fifty-five lakh fifty-four thousand four hundred forty-three)
- International System: 95,554,443 (Ninety-five million five hundred fifty-four thousand four hundred forty-three)
In simple words: The same 8-digit number is grouped with commas differently in the Indian and International systems.
Exam Tip: In the Indian system, commas are placed after 3 digits from the right, and then after every 2 digits. In the International system, commas are placed after every 3 digits from the right.

Question 2. Test your mind:- Fill in the blanks in the following magic squares:- (The sum of horizontal and vertical columns should be the same.)
Answer: Let us analyze the given magic square grid of size \(4 \times 4\).
Given entries:
- Row 1: [_, 10, 3, 6]
- Row 2: [4, 5, _, 9]
- Row 3: [_, 11, 2, 7]
- Row 4: [_, _, 8, _]
Let us determine the total sum or complete rows/columns if possible. Looking at Row 1: 10 + 3 + 6 = 19 (plus first cell). Looking at Column 3: 3 + ? + 2 + 8 = 13 + ?. Let us complete standard numbers 1 to 16 for a standard \(4 \times 4\) magic square where the magic sum is 34.
Let us solve cell by cell to make all rows, columns, and diagonals sum to 34:
- Row 1: 15, 10, 3, 6 (Sum = \(15 + 10 + 3 + 6 = 34\))
- Row 2: 4, 5, 16, 9 (Sum = \(4 + 5 + 16 + 9 = 34\))
- Row 3: 14, 11, 2, 7 (Sum = \(14 + 11 + 2 + 7 = 34\))
- Row 4: 1, 8, 13, 12 (Sum = \(1 + 8 + 13 + 12 = 34\))
Completed Magic Square:

In simple words: Fill the missing boxes such that every row and column adds up to the exact same total number (34).

Exam Tip: In magic squares, check the complete rows or columns first to find the target sum.

Question 3. Prepare a bill and find the total amount of the money spent on the things purchased from the tuck shop for the new session.
Answer: Let us prepare a sample bill for stationery items purchased from the school tuck shop:

Total amount spent = Rs. 200.00 + Rs. 50.00 + Rs. 120.00 + Rs. 80.00 = Rs. 450.00
In simple words: Multiply the quantity of each item by its price, then add all amounts together to get the total bill.

Exam Tip: Always align decimal points properly when adding money amounts in a bill.

Question 4. Measure and record the weight of each of your family members in kgs and convert them in gms.(prepare a table with s.no, name of family member, weight in kg and weight in g).
Answer: Let us prepare the table with sample family data, converting kilograms to grams by multiplying by 1000:

In simple words: To convert kilograms into grams, multiply the weight in kilograms by 1000.

Exam Tip: Remember that \(1 \text{ kg} = 1000 \text{ g}\).

Question 5. Calculate and write the total time of your summer vacations in the following ways:- (i) No. of days, (ii) No. of weeks, (iii) No. of months, (iv) No. of hours, (v) No. of minutes
Answer: Let us consider standard summer vacation duration of 45 days (approx. 1.5 months, e.g., May 15 to June 30):
(i) No. of days = 45 days
(ii) No. of weeks = \(45 \div 7 = 6\) weeks and 3 days (or approximately 6.43 weeks)
(iii) No. of months = 1.5 months (May 15 to June 30)
(iv) No. of hours = \(45 \text{ days} \times 24 \text{ hours/day} = 1080\) hours
(v) No. of minutes = \(1080 \text{ hours} \times 60 \text{ minutes/hour} = 64,800\) minutes
In simple words: Convert days to hours by multiplying by 24, and hours to minutes by multiplying by 60.

Exam Tip: 1 day = 24 hours, and 1 hour = 60 minutes.

Question 6. Complete the following introduction:- I am ________. My house no. is ________ (in figures) ________ (in words). My monthly pocket money is Rs. ________ (in words) ________ (in expanded form). My mother's age is ________ (in figures). My father's age is ________ (in figures). The sum of my mother's and father's age is ________ (in words). I am ________ years old. (write in Roman numerals)
Answer: Let us fill in sample student details:
- I am Aarav Sharma.
- My house no. is 42 (in figures) forty-two (in words).
- My monthly pocket money is Rs. five hundred (in words) 500 + 0 (in expanded form).
- My mother's age is 38 (in figures).
- My father's age is 42 (in figures).
- The sum of my mother's and father's age is \(38 + 42 = 80\), so eighty (in words).
- I am IX years old. (write in Roman numerals, e.g., 9 is IX)
In simple words: Fill each blank accurately with your personal information, converting numbers into words, expanded form, and Roman numerals as requested.

Exam Tip: Pay close attention to whether figures, words, expanded form, or Roman numerals are asked for each blank.

Question 7. Try to place appropriate sign \(+,-,\times,\div\) between the numbers:-
6 3 2 = 5
8 3 2 = 26
6 3 2 = 7
6 3 3 = 6
Answer: Let us find the correct mathematical signs for each equation:
1. \(6 \times 3 \div 2 = 5\)
Check: \(6 \times 3 = 18\), \(18 \div 2 = 9\) - wait, let us test \(6 - (3 \div 2)\) not integer. Let us check: \(6 + 3 - 2 = 7\). Let us use BODMAS: \(6 \times 3 = 18\) - no. Let us test: \(6 + (3 \times 2)\) - no. Let us check: \(6 - 3 + 2 = 5\).
Sign sequence: \(6 - 3 + 2 = 5\)
2. \(8 \times 3 + 2 = 26\)
Check: \(8 \times 3 = 24\), \(24 + 2 = 26\). Correct.
3. \(6 \times 3 \div 2 = 9\) - wait, if result is 7: \(6 + 3 - 2 = 7\). Correct.
4. \(6 \times 3 \div 3 = 6\)
Check: \(3 \div 3 = 1\), \(6 \times 1 = 6\). Correct.
In simple words: Test different combination of plus, minus, multiply, and divide signs keeping the order of operations in mind.

Exam Tip: Always apply BODMAS rule while checking arithmetic expressions.

Question 8. Be ready for the Mental Mathematics competition based on tables in which you'll get exciting prizes. Therefore, let tables till 20 be on your tips
Answer: This is a preparation instruction. Students must memorize multiplication tables from 2 to 20 thoroughly.
In simple words: Learn tables up to 20 by heart to solve mental math questions quickly and accurately.

Exam Tip: Quick recall of multiplication tables saves valuable time during exams.

ENGLISH

Question 1. Read three stories (1, 2 & 3) from your supplementary reader starting from page no. 131 and do the following:-
a.) Prepare a word bank of the new words that you have read in alphabetical order and write their meanings and arrange them.
b.) From each story draw any one character which you have liked the most and write about it in 50 words.
Answer:
a.) Sample Word Bank (arranged alphabetically):
1. Astonished: Greatly surprised or impressed.
2. Courage: The ability to do something that frightens one; bravery.
3. Delicate: Very fine in texture or structure; fragile.
4. Enormous: Very large in size or quantity.
5. Fierce: Having or displaying an intense or ferocious aggressiveness.
b.) Character Sketch (Sample for Story 1 - The Brave Little Tailor):
I liked the little tailor the most because he was extremely clever and courageous. Although he was small in size, he used his wit and intelligence to overcome giant opponents and tricky situations without actually fighting them directly. He teaches us that presence of mind is more powerful than physical strength.
In simple words: Make a list of new words in ABC order with their meanings, and write a short paragraph about your favorite character from the stories.

Exam Tip: Ensure alphabetical ordering is checked up to the second and third letters of each word.

Question 2. Watch an episode of your favorite cartoon show and then use your imagination to write the next episodes (minimum 2) in your own words and also present it in the form of a painting.
Answer:
Episode 1 Continuation: The Magic Treehouse Adventure
In this new episode, the main characters discover a hidden door inside the magical treehouse that leads to a cloud kingdom. They meet a friendly cloud-dragon who has lost his ability to float because he ate too many heavy star-candies. The friends help him exercise and drink sky-water until he floats again.
Episode 2 Continuation: Return of the Star-Dragon
Grateful for their help, the cloud-dragon takes them on a soaring tour across the rainbow bridge, teaching them how to paint auroras across the night sky before they return home safely before dinner.
In simple words: Create imaginative new adventures for your favorite cartoon characters and draw a colorful painting depicting the scene.

Exam Tip: Use descriptive adjectives and clear story sequencing (beginning, middle, end).

Question 3. Make a beautiful and creative booklet of 'meal planning' with at least five recipies suitable for summer in it. Remember to mention ingredients, quantity and procedure needed to prepare them. Paste related pictures to make your recipe book attractive.
Answer: Sample Summer Recipe - Refreshing Lemon Mint Cooler:
- Ingredients: Fresh mint leaves (10), Lemons (2), Sugar or Honey (3 tablespoons), Chilled water (4 glasses), A pinch of black salt and roasted cumin powder.
- Procedure:
1. Wash the mint leaves thoroughly.
2. Squeeze the juice of two lemons into a pitcher.
3. Add sugar/honey, black salt, and roasted cumin powder, stirring until dissolved.
4. Add chilled water and crushed mint leaves, mix well, and serve cold with ice cubes.
In simple words: Write down ingredients, exact quantities, and step-by-step instructions for 5 cool summer recipes like lemonade, fruit salad, or buttermilk.

Exam Tip: Use bullet points for ingredients and numbered steps for the procedure.

SCIENCE

Question 1. Make a First Aid box using any old small box. Cover the box with white paper and make a red plus sign on it. Keep essential first aid items in it.
Answer: Steps to make and stock a First Aid box:
1. Take a clean shoe box or cardboard box.
2. Wrap it neatly with white chart paper.
3. Draw or paste a bright red cross symbol on the top lid.
4. Stock it with essential items: antiseptic lotion, cotton, band-aids, sterile gauze, scissors, and thermometer.
In simple words: Decorate a small cardboard box with a white cover and red cross, and fill it with basic emergency medical items.

Exam Tip: Always keep antiseptic cream and band-aids in an easily accessible first aid kit.

Question 2. Some very tiny organisms called microbes are present around us. They may be useful or harmful. Collect the information about at least 4 different microbes from the internet. Paste their pictures and write their uses and harms.
Answer: Information on 4 different microbes:
1. Lactobacillus (Bacteria):
- Use: Helps in turning milk into curd.
- Harm: None under normal conditions; highly beneficial.
2. Yeast (Fungus):
- Use: Used in making bread, cakes, and idlis fluffy.
- Harm: Can cause food spoilage if left unmanaged.
3. Penicillium (Fungus):
- Use: Used to produce the life-saving antibiotic penicillin.
- Harm: Can cause mold allergies in sensitive individuals.
4. Influenza Virus:
- Use: None.
- Harm: Causes seasonal flu, fever, and respiratory infections.
In simple words: Microbes are tiny living things that can either help us (like making curd and bread) or cause diseases (like flu).

Exam Tip: Distinguish clearly between beneficial microbes (like bacteria and yeast) and harmful ones (disease-causing viruses).

Question 3. Draw, colour and name four food items from each food category or group.
Answer: Four food items from each major food group:
1. Energy-Giving Foods (Carbohydrates & Fats): Rice, Wheat, Potato, Butter.
2. Body-Building Foods (Proteins): Milk, Pulses (Dal), Eggs, Paneer.
3. Protective Foods (Vitamins & Minerals): Apple, Spinach, Carrot, Orange.
In simple words: Group foods according to what they do for our body: give energy, build muscles, or protect us from illness.

Question 4. Take empty wrappers of any biscuits, chocolates, juices or any other food item and Read the nutritional information provided on them. Then write and compare these values and state which product is the most nutritious.
Answer: Comparison of Nutritional Values (per 100g sample data):
- Product A (Whole Wheat Digestive Biscuit): Protein: 7g, Fiber: 6g, Sugar: 15g, Energy: 450 kcal.
- Product B (Chocolate Bar): Protein: 4g, Fiber: 2g, Sugar: 55g, Energy: 530 kcal.
- Product C (Mixed Fruit Juice): Protein: 0.5g, Fiber: 0.2g, Sugar: 18g, Energy: 80 kcal.
Conclusion: Whole Wheat Digestive Biscuit (Product A) is the most nutritious because it contains higher dietary fiber and protein, and lower refined sugar compared to chocolates and packaged juices.
In simple words: Read nutrition labels to check protein, fiber, and sugar content; the food with more fiber and less sugar is healthier.

Exam Tip: High sugar and low fiber indicate lower nutritional value.

SOCIAL SCIENCE

Question 1. Show all the physical features of India on a physical map and explain them in two or three lines.
Answer: The six major physical divisions of India are:
1. The Northern Mountains (Himalayas): Young fold mountains bordering India's northern frontier, protecting the country from cold northern winds.
2. The Northern Plains: Fertile alluvial plains formed by the Indus, Ganga, and Brahmaputra river systems, supporting dense populations.
3. The Great Indian Desert (Thar): Arid region in western India characterized by sandy soil, scanty rainfall, and sparse vegetation.
4. The Peninsular Plateau: Triangular tableland rich in minerals, bordered by the Western and Eastern Ghats.
5. The Coastal Plains: Narrow strips of fertile land flanking the eastern and western coasts of the peninsula.
6. The Islands: Lakshadweep in the Arabian Sea and Andaman & Nicobar Islands in the Bay of Bengal.
In simple words: India has diverse physical landforms including mountains, plains, deserts, plateaus, coasts, and islands.

Exam Tip: Practice locating all physical divisions correctly on an outline map of India.

Question 2. Send a mail to your friend and paste its print out in your notebook.
Answer: Steps to send an email:
1. Open an email service (like Gmail or Outlook).
2. Click on "Compose" or "New Mail".
3. Enter your friend's email address in the 'To' field.
4. Type a subject line (e.g., "Hello from Summer Vacation!").
5. Write your message in the body and click "Send", then take a printout.
In simple words: Type an email to your friend with a subject and message, send it, and print out the page.

Exam Tip: Always include a clear subject line and a polite greeting in emails.

Question 3. Note down daily the maximum and the minimum temperature of any two cities and compare them in your note book.
Answer: Sample temperature comparison for one week:
- City 1: Delhi (Northern Plains) - Average Max: 42 degrees Celsius, Min: 28 degrees Celsius (Hot and dry climate).
- City 2: Bengaluru (Southern Plateau) - Average Max: 30 degrees Celsius, Min: 20 degrees Celsius (Pleasant climate).
Comparison: Delhi experiences much higher temperatures than Bengaluru due to its inland location away from coastal breezes.
In simple words: Record daily high and low temperatures for two cities and note which city is hotter.

Exam Tip: Temperature varies based on latitude, altitude, and distance from the sea.

Question 4. Find information on five species each of extinct and endangered animals. Collect their pictures and share the information collected in the scrap book.
Answer:
1. Extinct Animals (Animals that no longer exist on Earth):
- Dinosaur: Giant reptiles that died out millions of years ago.
- Dodo: A flightless bird native to Mauritius, hunted to extinction in the 17th century.
- Tasmanian Tiger (Thylacine): A carnivorous marsupial from Australia.
- Passenger Pigeon: North American bird driven to extinction by habitat loss and hunting.
- Steller's Sea Cow: A large marine mammal hunted to extinction in the 18th century.
2. Endangered Animals (Animals facing high risk of extinction):
- Bengal Tiger: Threatened by poaching and loss of forest cover.
- Greater One-Horned Rhinoceros: Found in Assam, threatened by poaching for horns.
- Snow Leopard: High altitude cat threatened by climate change and loss of prey.
- Asian Elephant: Threatened by habitat fragmentation and human-animal conflict.
- Red Panda: Native to eastern Himalayas, threatened by deforestation.
In simple words: Extinct means animals that have died out completely, while endangered means animals that are in danger of dying out

Question 5. On a chart paper make a collage of the latest means of communication. using bold newspaper and magazine.
Answer: Steps to create the collage:
1. Collect old newspapers and magazines.
2. Cut out pictures of smartphones, laptops, satellites, fiber-optic cables, television sets, and social media icons.
3. Arrange and paste them creatively on a chart paper under the heading "Modern Means of Communication".
In simple words: Cut pictures of modern gadgets and internet media from magazines and paste them together on a chart paper.

Question 6. Make a poster to explain the impact of global warming.
Answer: Poster Guidelines and Slogan:
- Slogan: "Cool the Earth, Save Our Future! Stop Global Warming."
- Visuals: Draw melting glaciers, rising sea levels, and a stressed Earth surrounded by factories emitting smoke.
- Key Messages: Plant more trees, reduce plastic use, switch to renewable solar energy.
In simple words: Draw a poster showing melting ice caps and smoky factories with a strong slogan to protect our planet.
Exam Tip: Use catchy slogans and bright colors to make awareness posters effective.

COMPUTER

Question 1. How is computer important in our daily life. Write 5 lines about it On A4 size sheet.
Answer: Five lines on the importance of computers:
1. Computers help students learn, research, and complete school projects online.
2. They are used in banks for managing accounts, ATM transactions, and digital payments.
3. Hospitals use computers to maintain patient records and operate advanced medical machinery.
4. Railway and airline stations rely on computers for booking tickets and managing schedules.
5. They make communication instant through emails, video calls, and messaging apps.
In simple words: Computers make our work faster and easier in schools, hospitals, banks, and homes.

Exam Tip: Mention diverse fields like education, medicine, transport, and banking.

Question 2. Make a collage of fields where you find the use of computer on A4 sized sheet.
Answer: Steps to make the collage:
1. Cut pictures from magazines showing computers being used in laboratories, offices, supermarkets, schools, and hospitals.
2. Paste them neatly on an A4-sized sheet of paper.
3. Label each picture with the respective field (e.g., Education, Healthcare, Business).
In simple words: Collect and paste pictures of computers working in different professions on a single page.

Exam Tip: Keep the layout clean with proper headings for each picture sector.

GENERAL HOMEWORK

Question 3. Find out different beverages available in the market to beat the heat. Make a list of them, note down their compositions and choose the best three. Give reason of Choice.
Answer: List of summer beverages and their composition:
1. Lemonade (Nimbu Pani): Water, lemon juice, sugar, salt, roasted cumin powder.
2. Coconut Water: Natural mineral water, electrolytes, potassium, natural sugars.
3. Buttermilk (Chhaas): Curd, water, roasted cumin, black salt, coriander leaves.
4. Packaged Cold Drinks: Carbonated water, high fructose corn syrup, artificial colors, preservatives.
Top Three Choices: Coconut Water, Buttermilk, and Fresh Lemonade.
Reason of Choice: These three natural drinks provide essential minerals, rehydrate the body instantly, and contain no harmful chemical preservatives or refined sugars found in artificial sodas.
In simple words: Natural drinks like coconut water and buttermilk keep us healthy and cool without artificial chemicals.

Exam Tip: Natural and traditional drinks are always healthier than packaged carbonated soft drinks.

Question 9. Lets play with words--- Find at least 10 words which are composed of two or more meaningful words but make a very different meaning when combined.(try to find some new words) e.g. under+below/beneath + stand=upright ===> understand=comprehend. Sell= give for money + fish= an animal ===> selfish=concern with oneself.
Answer: Here are 10 compound words formed by combining two separate meaningful words to create a new meaning:
1. Butter + Fly = Butterfly (Not butter and not a flying insect in the literal sense, but a colorful winged insect).
2. Sun + Flower = Sunflower (A bright yellow flower that turns towards the sun).
3. Pan + Cake = Pancake (A flat cake fried on a pan).
4. Rain + Bow = Rainbow (A colorful arc in the sky caused by sunlight and rain).
5. Fire + Fly = Firefly (A flying beetle that glows in the dark, not made of fire).
6. Tooth + Brush = Toothbrush (A brush used specifically for cleaning teeth).
7. Basket + Ball = Basketball (A sport played by shooting a ball through a netted hoop).
8. Key + Board = Keyboard (A panel of keys used to operate a computer or type).
9. Note + Book = Notebook (A book made of blank paper for writing notes).
10. Moon + Light = Moonlight (The light coming from the moon).
In simple words: Compound words are two small words joined together to make a new word with a completely different meaning.

Exam Tip: Check that both parts of the compound word are independent, valid English words.