MATTER AND MATERIALS

Question 1

What is MATTER?

Answer 1

Matter can be a solid, liquid or gas By adding or reducing heat energy the substance can change from one state to another

Question 2

Explain a SOLID

Answer 2

* Particles densely packed and fused together * Has a particular shape and volume * Movement (vibration) so small cannot be detected

Question 3

Explain Liquid

Answer 3

* Particles densely packed but move around * DO NOT have a shape but HAVE volume * Take shape of container * More movement than a solid

Question 4

Explain Gas

Answer 4

* Particles are far apart - move freely * Do not have shape or volume * Particles has high energy and move quickly and constantly

Question 5

What is dry ice?

Answer 5

Dry ice is frozen carbon dioxide Temperature of 78 * C Turns into gas when exposed to heat

Question 6

What is sublimation

Answer 6

When a solid turns DIRECTLY into gas when exposed to heat energy.

Question 7

What is plasma?

Answer 7

* Plasma is ionised gas. * The atom is stripped of electrons and has positive charge. * These atoms react to electromagnetic fields * Does not occur in nature, except the Northern lights

Question 8

What energy is needed to change the state of a matter?

Answer 8

HEAT Energy

Question 9

Name a natural and synthetic matter

Answer 9

Wood and Plastic

Question 10

Name 4 properties to classify materials

Answer 10

* solid * gas * liquid * plasma

Question 11

the temp at which a liquid boils and turns to gas

Answer 11

boiling point - 100 *C

Question 12

when solid turns into a liquid

Answer 12

melting (ice - 0*C)

Question 13

when a liquid turns into a solid

Answer 13

freezing