Activate 1 Chapter 1 Particles and their behaviour Chemistry

Question 1

Name the three states of matter.

Answer 1

Solid, liquid, and gas.

Question 2

What is the process called when a solid becomes a liquid?

Answer 2

Melting

Question 3

What is the process called when a solid becomes a gas?

Answer 3

Sublimation

Question 4

What is the process called when a gas turns into a liquid?

Answer 4

Condensation

Question 5

What is the arrangement of particles in a solid?

Answer 5

Neatly arranged
Closely compacted

Question 6

How can we know if a substance is pure?

Answer 6

If the melting point is flat

Question 7

Diffusion happens quickest in liquids. True or false?

Answer 7

False

Question 8

Name the three factors that affect diffusion.

Answer 8

Particle size
The weight of the particle
The state of the diffusing substance

Question 9

Name three factors that affect gas pressure.

Answer 9

Temperature
Particle size
State of container

Question 10

What causes gas pressure?

Answer 10

When the particles hit the sides of a container, this causes gas pressure

Question 11

How does temperature affect gas pressure?

Answer 11

Temperature affects gas pressure because particles move more quickly and can hit the container more frequently

Question 12

Can a solid be compressed?

Answer 12

No, because there isn’t any space between the particles

Question 13

How does condensation happen?

Answer 13

The particles lose energy from their surroundings, particles move slower, particles come closer together.

Question 13

Can a gas flow?

Answer 13

Yes, a gas can flow, because the particles can move around

Question 14

How can melting happen?

Answer 14

Melting happens because as particles gain energy from their surroundings, they vibrate faster and particles lose their place in the pattern, causing melting!