Boiling

Q.

When steam is cooled down, it gets converted into ice.

1. True
2. False

Q.

Ice + ____ $\to$ Liquid water

1. Ice

2. Sugar

3. Heat

4. Salt

Q.

Rima's mother was baking a cake. Rima could smell it before entering her house.How?

Q.

What happens to the molecules in liquids when you heat it?

1. The molecules freeze

2. The molecules start moving around quickly

3. The molecules stay still

4. The molecules start slowing down

Q. Write down the ways to cool down the food at home.

Q. Boiling involves change in the physical state of substance.

1. True
2. False

Q.

Which of the following qualifies as a gas?

1. Ice

2. Sponge

3. Vapour

4. Vinegar

Q. Boiling of water can kill most of the germs present in it.

1. True
2. False

Q.

Liquid water + _____ $\to$ Water vapour.

1. cooling

2. heating

3. freezing

4. melting

Q.

Define boiling.

Q.

Liquid water + _____ $\to$ Water vapour.

1. Liquid

2. Heat

3. Ice

4. Dry ice