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What happens when we cool it?

2nd grade (Year 3 in England) · 16 questions · Common Core: NGSS.2-PS1-4 · England: KS1 Y2 Uses of everyday materials, KS2 Y4 States of matter

Name

Date

Score/ 16

1
Question 1
A cold drink can has drops of water on the outside on a warm day. Where did they come from?
- A. Water vapour in the air cooled on the can and turned into droplets.
- B. The drink leaked through the metal.
- C. The can is sweating like a person.
- D. It rained on the can indoors.
2
Question 2
True or false? Frozen juice can never melt back into juice.
- A. True
- B. False
3
Question 3
What happens when this cools down: fruit juice in a lolly mould in the freezer?
- A. becomes an ice lolly (popsicle)
- B. freezes into ice
- C. turns back into solid wax
- D. sets hard again
4
Question 4
Why do ponds freeze on cold winter nights?
- A. The water cools below 0 °C and turns to ice.
- B. Snow falls into the pond and makes it solid all the way down.
- C. The Moon cools the water.
- D. The fish make ice.
5
Question 5
True or false? Steam turns back into water when it touches something cold.
- A. True
- B. False
6
Question 6
What happens when this cools down: water in the freezer?
- A. sets hard again
- B. sets into a wobbly solid
- C. turns into water droplets
- D. freezes into ice
7
Question 7
Hot wax is poured into a candle mould. What must happen before you can take the candle out?
- A. The wax must boil.
- B. The wax must dissolve.
- C. The wax must be heated more.
- D. The wax must cool and become solid.
8
Question 8
True or false? Melted chocolate sets hard again when it cools.
- A. True
- B. False
9
Question 9
What happens when this cools down: water in the freezer?
- A. freezes into ice
- B. sets hard again
- C. turns into water droplets
- D. sets into a wobbly solid
10
Question 10
Why does a bathroom mirror steam up after a hot shower?
- A. Warm, damp air cools on the mirror and forms tiny water drops.
- B. Light turns into water.
- C. The mirror is melting.
- D. Soap sticks to the mirror.
11
Question 11
True or false? Water gets bigger and hotter when it freezes.
- A. True
- B. False
12
Question 12
What happens when this cools down: water in the freezer?
- A. freezes into ice
- B. sets into a wobbly solid
- C. sets hard again
- D. turns into water droplets
13
Question 13
Why do ponds freeze on cold winter nights?
- A. The Moon cools the water.
- B. Snow falls into the pond and makes it solid all the way down.
- C. The fish make ice.
- D. The water cools below 0 °C and turns to ice.
14
Question 14
True or false? Melted chocolate sets hard again when it cools.
- A. True
- B. False
15
Question 15
What happens when this cools down: water in the freezer?
- A. freezes into ice
- B. turns back into solid wax
- C. turns into water droplets
- D. sets into a wobbly solid
16
Question 16
Why does a bathroom mirror steam up after a hot shower?
- A. Warm, damp air cools on the mirror and forms tiny water drops.
- B. The mirror is melting.
- C. Light turns into water.
- D. Soap sticks to the mirror.

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