Changes of State

Question 1

When a solid changes into a liquid we call it…

Answer 1

melting

Question 2

When a liquid changes into a gas we call it…

Answer 2

evaporating

Question 3

When a gas changes into a liquid we call it…

Answer 3

condensation

Question 4

When a liquid changes into a solid we call it…

Answer 4

freezing

Question 5

How do we change a solid into a liquid?

Answer 5

Heat it past its melting point

Question 6

How do we change a liquid into a gas?

Answer 6

Heat it past its boiling point

Question 7

How do we change a gas into a liquid?

Answer 7

Cool it down lower than its boiling point

Question 8

How do we change a liquid into a solid?

Answer 8

Cool it down to its freezing point

Question 9

What is the freezing point of water?

Answer 9

0 Degrees Celsius

Question 10

What is the boiling point of water?

Answer 10

100 Degrees Celsius

Question 11

What happens to the particles in a solid when it melts?

Answer 11

Particles have enough energy to break free of their bonds slightly and can roll around in a liquid state

Question 12

What happens to the particles in a liquid when it evaporates?

Answer 12

Particles have enough energy to break free of their bonds completely and are free to fly around

Question 13

What happens to the particles in a gas when they condense into a liquid.

Answer 13

Particles lose energy and weak bonds form between them so that they roll around in a liquid state.

Question 14

What happens to the particles in a liquid when they freeze?

Answer 14

Particles lose energy and bonds form between them so that they vibrate in a solid state.