SC1

Question 1

What are the three states of matter?

Answer 1

• Solid
• Liquid
• Gas

Question 2

What is the arrangement and movement of particles for each state of matter?

Answer 2

Gas:
- Random and far apart
- Fast in all directions

Liquid:
- Random and close together
- Move around each other

Solid:
- Regular and close together
- Vibrate about fixed positions

Check book diagram B page 2.

Question 3

What type of changes are state changes?

Answer 3

Physical changes.

Question 4

What are physical changes?

Answer 4

Changes that can be reversed and the chemical properties of the substance do not change.

Question 5

Why are state changes physical changes?

Answer 5

The particles themselves do not change - only their arrangement, movement and amount of stored energy.

Question 6

What are all the names of the interconversions between the three states of matter?

Answer 6

Solid –> liquid: melting
Liquid –> gas: evaporation and boiling
Gas –> liquid: condensing
Liquid –> solid: freezing
Solid –> gas: sublimation
Gas –> solid: deposition