Changes of states

Question 1

What are the Heating up states?

Answer 1

Melting - When a solid is heated, it absorbs energy and it melts, turning into a liquid.

Boiling - If the liquid is heated, it absorbs more energy and it boils, turning into a gas.

Evaporating - when a liquid turns into a gas slowly, at temperatures that are below its
boiling point.

Question 2

What are endothermic and exothermic reactions?

Answer 2

Endo sounds like ‘into’ - the energy goes into the chemicals from the surroundings.

Exo sounds like ‘exit’ - the energy is leaving the chemicals and is transferred to the surroundings.

Question 3

What are the Cooling down states?

Answer 3

Condensing - If a gas is cooled, it transfers energy to the surroundings, and turns into a liquid.

Freezing - If the liquid is cooled, it transfers energy to the surroundings, and turns into a solid.

Question 4

What is sublimation?

Answer 4

Some solids change directly into a gas without becoming a liquid first.

Question 5

What happens when energy is removed from a liquid?

Answer 5

It freezes