Transcript snc1d u2 lesson 1 investigating matter 1

Investigating Matter and
WMHIS
Lesson 1
September 22nd, 2010
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)
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Matter can be found as a solid, liquid or gas.
(or even a combination of these)
Changes of State

There are 3 states of matter
Solid
 Liquid
 gas
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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
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Terms for changes of state

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.

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
The Particle Theory of
Matter (4 points)
Way of describing matter.
1. All matter is composed of very tiny
objects called particles.
2. Each Pure substance has its own kind of
particles, different from the particles of
other pure substances.

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.
The Particle Theory of
Matter (4 points)

The distances between the particles change
for different states of matter.
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.
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.
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MSIP – WRITE IN AGENDA
Work on
 Questions 1-5
 WHMIS work package