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CBSE · Class 3 · Science

Taking Charge of Waste

Standard difficulty · 20 questions · 40 marks · Time: 54 minutes

Name: Date: Score: ____ / 40

Show your working for Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
Fruit peels and dried leaves go into the:
  1. river
  2. roadside
  3. blue dustbin
  4. green dustbin
2.
Which of these goes into the GREEN dustbin?
  1. rotten fruit
  2. a glass bottle
  3. an old light bulb
  4. an old notebook
3.
Which of these goes into the BLUE dustbin?
  1. a banana peel
  2. leftover food
  3. dried leaves
  4. an old light bulb
4.
Which of these is a way to REUSE something?
  1. turning old plastic into new things in a factory
  2. buying fruit without plastic wrapping
  3. refilling a steel water bottle
  4. carrying a cloth bag to the market
5.
Which of these is a way to REDUCE waste?
  1. wrapping a gift in old newspaper
  2. making new paper from old newspapers in a factory
  3. making a quilt from old clothes
  4. saying no to a plastic straw
6.
What harm can plastic mixed with food scraps on the road cause?
  1. the people who collect waste can get cut
  2. animals may eat it and fall ill
  3. the air becomes dirty and hard to breathe
  4. rainwater cannot flow away and the street floods
7.
15 children each bring 4 old bottles for recycling. How many bottles do they bring?
  1. 56 bottles
  2. 19 bottles
  3. 64 bottles
  4. 60 bottles
8.
A school puts 4 kg of green waste into its compost pit every day. How much does it put in over 6 days?
  1. 28 kg
  2. 10 kg
  3. 24 kg
  4. 20 kg
Section B — Short answer8 × 2 = 16 marks
9.
Name three things in your home that become waste.
10.
Write "green" or "blue" for the dustbin each goes into: (a) an old light bulb (b) a used milk packet
11.
Is it "reduce", "reuse" or "recycle"? (a) using a glass jar again to store dal (b) wrapping a gift in old newspaper
12.
Left in the soil, does it "rot" or "not rot"? (a) an old notebook (b) a banana peel
13.
Mother takes a cloth bag to the market 4 times a week instead of taking a plastic bag. How many plastic bags does she save in 6 weeks?
14.
In a clean-up drive, 14 children each filled 3 bags of rubbish. How many bags did they fill?
15.
A class sorted 24 pieces of waste. 19 went into the green dustbin and the rest into the blue one. How many went into the blue dustbin?
16.
Khushi used the back of 18 old sheets of paper for rough work. How many sides of paper did she use in all, front and back?
Section C — Word problems4 × 4 = 16 marks
17.
Plan a zero-waste birthday party. What waste could be made, and how will you avoid it?
18.
Each of 7 classes makes 5 bags of waste a day, and the school is open 5 days a week. (a) How many bags of waste are made in a day? (b) How many in a week?
19.
Sort these into the green and the blue dustbin: a banana peel, a plastic bottle, used tea leaves, an old light bulb, rotten fruit, a glass bottle. What happens to the waste in each bin?
20.
What harm does each cause, and how can we stop it? (a) broken glass thrown loose in a bin (b) garbage piled near homes
AmbifulWorksheets
Practice that never repeats
CBSE · Class 3 · Science

Answer key

Taking Charge of Waste · AW-3S-WAS-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) green dustbin—
2(a) rotten fruit—
3(d) an old light bulb—
4(c) refilling a steel water bottle—
5(d) saying no to a plastic straw—
6(b) animals may eat it and fall ill—
7(d) 60 bottles15 × 4 = 60
8(c) 24 kg4 × 6 = 24
9Any three: fruit and vegetable peels, paper, plastic wrappers, bottles, tins, old clothes, pencil shavings, old batteries.—
10(a) blue (b) blue—
11(a) reuse (b) reuse—
12(a) does not rot (b) rots—
1324 bags4 × 6 = 24
1442 bags14 × 3 = 42
155 pieces24 − 19 = 5
1636 sides18 × 2 = 36
17Waste: plastic plates, wrappers, balloons, leftover food; avoid it with steel plates, home-made decorations, newspaper gift wrap and just enough food.—
18(a) 35 bags (b) 175 bags7 × 5 = 35; × 5 = 175
19Green: a banana peel, used tea leaves, rotten fruit. Blue: a plastic bottle, an old light bulb, a glass bottle. Green-bin waste becomes compost; blue-bin waste is sent for recycling.—
20(a) the people who collect waste can get cut (b) germs spread and people fall ill—