C1.1 Flashcards
1
Q
What is a solid?
A
Solid
- Particles packed together
- Particles vibrate about a fixed position
2
Q
What is a liquid?
A
Liquid:
- Particles close together
- Move around each other
3
Q
What is a gas?
A
Gas:
- Particles spread far apart
- Move around randomly in all directions
4
Q
What is a physical change?
A
Physical change:
- No new substances made
- Reversible
5
Q
What is a chemical change?
A
Chemical change:
- 1 or more substances created
- Usually irreversible
6
Q
What does particle model not show?
A
Particle model does not show:
- Forces between particles (electrostatic)
- Size of particles
- Space between particles
