Green Environment Book Back Answers & Guides
Unit 1 > Science > Class 4 > Samacheer Kalvi - English Medium
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1. What is the first step in waste management?
(a) Waste disposal
(b) Waste separation
(c) Waste collection
Correct answer:
(b) Waste separation
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2. Which is an example for non-biodegradable waste?
(a) Paper cup
(b) Plastic plate
(c) Coconut shell
Correct answer:
(b) Plastic plate
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3. Picking up the waste is called __________.
(a) Composting
(b) Waste collection
(c) Recycling
Correct answer:
(b) Waste collection
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4. ____________ is the first R in the Three Rs.
(a) Reuse
(b) Reduce
(c) Recycle
Correct answer:
(b) Reduce
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1. _________ is an example of reusing waste. (Using old jars for pickle/Saying no to a plastic bag)
Correct answer:
Using old jars for pickle
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2. ________ is used to make bags, dustbins and tooth brushes. (Rose / Bamboo)
Correct answer:
Bamboo
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3. __________ is a big threat to our environment. (Plastic / Light)
Correct answer:
Plastic
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4. __________ is a non-recyclable item. (Glass / Multilayer plastic)
Correct answer:
Multilayer plastic
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1. Plastic waste
Correct answer:
Threat to environment
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2. Waste separation
Correct answer:
Biodegradable, recyclable and non-recyclable
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3. Reduce, Reuse and Recycle
Correct answer:
Three Rs
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4. Stainless steel
Correct answer:
Eco-friendly material
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1. 3R method reduces the amount of waste that goes to landfi lls.
Correct answer:
TRUE
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2. Eco-friendly material is harmful to the environment.
Correct answer:
FALSE
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3. Plastic bag, thermocol and multilayer plastics are recyclable.
Correct answer:
FALSE
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4. We should not separate our waste.
Correct answer:
FALSE
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1. My group is called colony. ---------------
Correct answer:
Ant
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2. Our home is nest. ------------
Correct answer:
birds
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3. My feet are broad to help me walk in the sand. --------------------
Correct answer:
Camel
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4. I use sound navigation to find the objects in my path. --------------
Correct answer:
Bats
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5. I am active during day time as well as night time. -------------------
Correct answer:
Lion
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1. The animals which are active at night are called _____.
Correct answer:
Nocturnal animals
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2. _____ is best known for parental care.
Correct answer:
Kangaroo
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3. The group of owls are called _____
Correct answer:
Parliament
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4. _____ lives in hives
Correct answer:
Honey bee
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5. _____ bites us and sucks our blood.
Correct answer:
Mosquito
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1. Wingless insect
Correct answer:
Silver fish
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2. Elephant
Correct answer:
Herd
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3. Giraffe
Correct answer:
Long neck
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4. Ants
Correct answer:
Smell
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5. Fish
Correct answer:
Gills