1. Investigating Matter and WMHIS
Lesson 1
September 22nd, 2010

2. Matter has many forms Matter – anything that has mass and volume.
Mass is a measure of the quantity of an object. (g, kg,)
Volume is a measure of space taken up (mL, L)
Matter can be found as a solid, liquid or gas. (or even a combination of these)

3. Changes of State
There are 3 states of matter
Solid
Liquid
gas

4. Terms for changes of state
Melting – Change from a solid to a liquid
Evaporation - Change from a liquid to a gas
Condensation - Change from a gas to a liquid
Freezing - Change from a liquid to a solid
Sublimation - Change from a solid to a gas
Deposition - Change from a gas to a solid

5. Terms for changes of state

6. The temperature at which a solid turns into a liquid is called the melting point. (water is 0°C) The reverse process, freezing, occurs at the freezing point.

7. the temperature at which a liquid turns to a gas is called the boiling point. The boiling point is the same temperature as the condensing point, the temperature at which a gas changes into a liquid

8. The Particle Theory of Matter (4 points)
Way of describing matter.
All matter is composed of very tiny objects called particles.
Each Pure substance has its own kind of particles, different from the particles of other pure substances.

9. The Particle Theory of Matter (4 points)
3. Particles present in matter are always in motion. They may be vibrating back and forth, as in a solid, or moving in all directions, as in a gas. In a liquid, particles stay close together but can slide past one another.
4. The particles in a substance attract each other. The amount of attraction is different for different kinds of particles. All particles have spaces between them.

10. The Particle Theory of Matter (4 points)
The distances between the particles change for different states of matter.

11. Particles and Heat
In ice, the particles of water vibrate in place but cannot move around. They attract each other strongly, forming a solid.
As heat is added, the particles of water vibrate more quickly, which weakens the attraction between them, allowing them to slide past each other.

12. This allows water to flow as a liquid
This allows water to flow as a liquid. When enough heat is added, the particles of water break free from each other and separate, forming a gas.

14. MSIP – WRITE IN AGENDA
Work on
Questions 1-5
WHMIS work package