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CBSE · Class 5 · Science

Water—The Essence of Life

Standard difficulty · 20 questions · 40 marks

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.
Most of the water on the Earth is found in:
  1. ponds
  2. wells
  3. rivers
  4. the oceans
2.
A mopped floor dries after a while. This is because of:
  1. freezing
  2. melting
  3. evaporation
  4. condensation
3.
The river Mahi flows into the:
  1. Thar Desert
  2. Wular Lake
  3. Bay of Bengal
  4. Arabian Sea
4.
Which of these has SALT water?
  1. Sambhar Lake (Rajasthan)
  2. Dal Lake
  3. a glacier
  4. a well
5.
In a water animal, flippers:
  1. take in oxygen dissolved in the water
  2. pushes a fish forward
  3. let a turtle row through the sea
  4. help a duck paddle
6.
Which of these plants floats freely on the water, with no roots in the mud?
  1. reeds
  2. hydrilla
  3. duckweed
  4. water lily
7.
A leaking tap fills one glass every 10 minutes. How many glasses of water does it waste in 16 hours?
  1. 160 glasses
  2. 48 glasses
  3. 96 glasses
  4. 112 glasses
8.
Suppose all the water on the Earth filled 3,900 buckets. About 3 out of every 100 buckets would be fresh water. How many buckets is that?
  1. 1,170 buckets
  2. 3,783 buckets
  3. 117 buckets
  4. 1,300 buckets
Section B — Short answer8 × 2 = 16 marks
9.
Why can we not drink sea water?
10.
Is it a solid, a liquid or a gas? (a) sea water (b) tears
11.
Write "fresh" or "salt" for the water in each: (a) Dal Lake (b) groundwater
12.
Into which sea does each river flow? (a) Sabarmati (b) Mahanadi
13.
Name the process (evaporation, condensation, melting or freezing): (a) Juice poured into moulds becomes ice lollies. (b) Dew forms on grass early in the morning.
14.
Each of the 7 people in a family uses a 18-litre bucket of water for a bath every day. How many litres do they use for baths in a week?
15.
A water tank holds 225 L. How many 25-litre buckets of water will fill it?
16.
A dripping tap wastes 1 glass of water every 6 minutes. How many glasses are wasted in 5 hours?
Section C — Word problems4 × 4 = 16 marks
17.
Explain the water cycle in four steps.
18.
A school roof sends rainwater into a tank: 50 L for every hour of rain. One month it rained for 2 hours on each of 8 days. (a) How many litres were collected? (b) The school garden needs 80 L a day. For how many full days will the water last?
19.
An open tap pours out 4 litres a minute. Brushing with the tap running for 4 minutes uses 16 litres, but brushing with a mug uses only 2 litres. (a) How much water does one person save each time by using a mug? (b) How much do 6 people save in a week if each brushes once a day?
20.
Where and how do these plants grow in a pond? (a) duckweed (b) water lily. Draw one of them.
AmbifulWorksheets
Practice that never repeats
CBSE · Class 5 · Science

Answer key

Water—The Essence of Life · AW-5S-WAT-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) the oceansabout 97 out of every 100 parts
2(c) evaporation—
3(d) Arabian Sea—
4(a) Sambhar Lake (Rajasthan)—
5(c) let a turtle row through the sea—
6(c) duckweed—
7(c) 96 glasses60 ÷ 10 = 6 glasses an hour; × 16 = 96
8(c) 117 buckets3,900 ÷ 100 × 3 = 117
9It has a lot of salt dissolved in it, which makes it harmful to drink.—
10(a) liquid (b) liquid—
11(a) fresh (b) fresh—
12(a) Arabian Sea (b) Bay of Bengal—
13(a) freezing (b) condensation—
14882 L7 × 18 = 126 L a day; × 7 = 882 L
159 buckets225 ÷ 25 = 9
1650 glasses60 ÷ 6 = 10 an hour; × 5
17Evaporation: the Sun heats water in seas, rivers and lakes, and it becomes vapour. Condensation: the vapour rises, cools and forms clouds of tiny drops. Precipitation: the drops join and fall as rain or snow. Collection: the water flows into rivers and seas or soaks into the ground, and the cycle repeats.—
18(a) 800 L (b) 10 days50 × 2 × 8 = 800; 800 ÷ 80 = 10 (whole days)
19(a) 14 L (b) 588 L16 − 2 = 14; × 6 × 7 = 588
20(a) floats freely on the surface (b) rooted in mud, with leaves floating on top—