If you are looking for DAV Class 4 Science Chapter 6 Question Answer Insects of My Living World science book, then you are at the right place. Here at NCERTBooksPDF, Class 4 Science Chapter 6 exercises are solved with accurate, child-friendly explanations, clear matching tables, and complete solutions to help DAV students score top marks in their exams.
Table of Contents
- DAV Class 4 Science Chapter 6 Insects Solutions
- A. Fill in the Blanks
- B. Write True or False (With Explanations)
- C. Tick the Correct Option
- D. Answer the Following Questions in Brief
- E. Answer the Following Questions (Detailed Explanations)
- Value-Based Questions
- Something to Do
DAV Class 4 Science Chapter 6 Insects Solutions
DAV Class 4 Science Chapter 6 Insects explores useful insects (honeybees, silkworms, lac insects, ladybird beetles) and harmful insects (houseflies, mosquitoes, locusts), their sting mechanisms, diseases spread, and prevention methods. Below are the complete textbook solutions.
A. Fill in the blanks.
1. Butterflies are attracted to sweet-smelling / colourful flowers.
2. Honeybees suck nectar from flowers.
3. The six-sided chambers of beehives are called honeycombs.
4. Malaria is spread by the bite of female Anopheles mosquito.
5. The cover, weaved by a silk moth, around itself is called a cocoon.
6. Bees are social stinging insects.
Answer: (1) sweet-smelling / colourful | (2) nectar | (3) honeycombs | (4) Anopheles mosquito | (5) cocoon | (6) social
B. Write True or False for the following statements.
1. Insects help in pollination.
Answer: True
Reason: Butterflies and bees transfer pollen grains from one flower to another as they feed on nectar.
2. Lac insects grow on banyan trees.
Answer: True
Reason: Lac insects live on trees like banyan, ber, and palas and secrete a resinous substance called lac.
3. Houseflies spread malaria.
Answer: False
Reason: Malaria is spread by the bite of the female Anopheles mosquito; houseflies spread cholera, diarrhea, and typhoid.
4. Aedes mosquito spreads dengue.
Answer: True
Reason: Dengue and chikungunya are transmitted to humans by the bite of the infected Aedes mosquito.
5. Bubonic plague is caused by a mosquito.
Answer: False
Reason: Bubonic plague is caused by bacteria transmitted by rat fleas, not mosquitoes.
C. Tick (âś“) the correct option.
1. The insect, that usually spreads jaundice, is the—
(a) mosquito
(b) wasp
(c) housefly
(d) butterfly
Answer: (c) housefly
Explanation: Houseflies contaminate food with germs picked up from garbage, spreading diseases like jaundice and cholera.
2. Honeybees make honey from—
(a) lac
(b) nectar
(c) milk
(d) sugar
Answer: (b) nectar
Explanation: Worker honeybees collect sweet floral nectar from flowers and transform it into honey inside their hive.
3. The sting of insects, like the bees and wasps, is located on their—
(a) wing
(b) back
(c) mouth
(d) leg
Answer: (b) back (rear end of the abdomen)
Explanation: The sharp stinger of bees and wasps is located at the back tip of their abdomen.
4. An insect, that helps to save our crops from pests, is the—
(a) wasp
(b) ladybird beetle
(c) bee
(d) butterfly
Answer: (b) ladybird beetle
Explanation: Ladybird beetles are farmer-friendly insects that eat harmful agricultural pests like aphids.
D. Answer the following questions in brief.
1. What is pollination?
Answer: The process of transfer of pollen grains from the anther to the stigma of a flower is called pollination. Insects like honeybees and butterflies are primary pollinators.
2. Where do bees store the nectar?
Answer: Honeybees store nectar in the hexagonal, six-sided chambers of their beehive, known as honeycombs.
3. Name the insect that gives us silk. What does it feed on?
Answer: The silk moth (silkworm) gives us silk. Its caterpillars feed greedily on fresh green mulberry leaves.
4. Name the diseases that get spread by houseflies.
Answer: Houseflies spread cholera, typhoid, diarrhea, dysentery, and jaundice.
E. Answer the following questions.
1. How does a silk moth weave a cocoon?
Answer: The silkworm secretes a continuous fine liquid thread from special salivary glands in its mouth. When this liquid touches air, it solidifies into delicate silk fiber. The caterpillar spins this silk thread continuously in figure-eight movements around its body, forming an oval protective shell called a cocoon.
2. How is honey collected from a beehive?
Answer: To collect honey, a smoky fire is lit beneath the beehive. The heat and smoke drive the bees away without killing them. Honey harvesters then safely detach the honey-filled combs, squeeze out pure honey, and filter it for consumption.
3. What is lac? State its four uses.
Answer: Lac is a natural resinous secretion produced by tiny lac insects that live on banyan, ber, and palas trees.
Four uses of lac:
- Used in making sealing wax for official documents and parcels.
- Used for manufacturing traditional lac bangles, jewelry, and cosmetics.
- Used in high-grade wood varnishes, paints, and wood polishes.
- Used as a glossy coating for medicinal pills and confectionery.
4. How do houseflies spread diseases?
Answer: Houseflies visit and feed on unhygienic places like open garbage dumps, animal manure, sewage, and rotten matter. Millions of dangerous bacteria and disease germs stick to their hairy legs and wings. When these flies land on uncovered food, they deposit these germs onto it. When people eat this contaminated food, they fall ill with stomach infections like cholera and diarrhea.
5. How can we save ourselves from harmful insects?
Answer: We can protect ourselves from harmful insects by:
- Installing fine wire mesh screens on windows and doors to keep flies and mosquitoes out.
- Always keeping cooked food and drinking water covered with clean lids.
- Preventing water stagnation in room coolers, flower pots, tires, and ditches to prevent mosquito breeding.
- Using mosquito nets, repellent creams, and electronic vaporizers while sleeping.
- Disposing of domestic garbage daily in covered dustbins and spraying disinfectants in drains.
Value-Based Questions
Mohit studies in Class-IV. He likes street food very much. His mother always warns him not to eat unhealthy and uncovered food. One day Mohit ate some uncovered street food while coming back to his home from school. In the evening, he complained about stomach cramps and vomiting. His mother immediately took him to a doctor. The doctor diagnosed that Mohit was suffering from diarrhea. Mohit told the truth to his mother and felt sorry for not listening to her advice. He promised not to eat uncovered street food in future.
1. Name the insect which spreads diarrhea.
Answer: Housefly.
2. State the common symptoms of diarrhea.
Answer: Frequent watery stools, severe abdominal cramps/pain, nausea, vomiting, fever, dehydration, and body weakness.
3. Your younger brother/sister likes to eat junk and street food. How can you help him/her to develop healthy eating habits?
Answer:
- Explain gently how roadside food is contaminated with flies, dust, and harmful germs.
- Help parents prepare tasty, colorful homemade alternatives like vegetable pasta, fruit smoothies, and paneer wraps.
- Reward them when they choose wholesome home-cooked meals over fried street snacks.
4. Mention any two values shown by Mohit.
Answer:
- Truthfulness / Honesty: Confessing his mistake openly to his mother rather than concealing it.
- Self-correction and Humility: Apologizing sincerely and promising to obey his parents’ healthy guidance in the future.
Something to Do
1. Insect Picture Scrapbook: Collect pictures of beneficial insects (honeybee, silkworm, ladybird beetle) and harmful insects (housefly, mosquito, termite, wasp). Paste them in your notebook with two key facts for each.
2. Natural Insect Repellents: Research natural methods used in Indian homes to repel insects, such as dried neem leaves in wardrobes, camphor tablets, and clove-lemon arrangements.
Related Chapters:
- DAV Class 4 Science Solutions (All Chapters)
- DAV Class 4 Science Chapter 5 Birds—Beaks and Claws
- DAV Class 4 Science Chapter 7 Food
🎉 Chapter 6 Completed!
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