Changes Of State

Question 1

What is the change of state from a solid to a gas called?

Answer 1

Sublimation

Question 2

What is the change of state from a gas to a solid called?

Answer 2

Deposition

Question 3

What is the other term for evaporation?

Answer 3

Vaporisation

Question 4

What is the other term for freezing?

Answer 4

Solidifying

Question 5

Is mass conserved when a substance changes state?

Answer 5

Yes - because the number of atoms does not change

Question 6

What is a physical change?

Answer 6

A reversible change, where the original properties can be recovered

Question 7

Give an example of a physical change

Answer 7

Melting ice cream
Evaporating water
Dissolving sugar in tea

Question 8

What is a chemical change?

Answer 8

A change that is irreversible - a chemical reaction takes place. You cannot recover the original properties

Question 9

Give an example of a chemical change

Answer 9

Adding acid to alkali
Burning fuel
Baking a cake
Burning a candle

Question 10

When a change of state takes place, what happens to the temperature of a substance?

Answer 10

It stays the same