1. The Material World
What is Matter???

2. What’s the Matter?
Matter is anything that has mass, and takes up space
examples:
bowling balls have lots of mass - they are heavy - so they are made of matter
you have mass, and you take up space, so you are made of matter
air has only a little mass, but it has some, and takes up lots of space, so air is matter.
any kind of material, solid, liquid, or gas is made of matter

3. The Particle Theory of Matter
Matter (of any kind) is made up of extremely tiny particles.
These particles are constantly in motion.
At higher temperatures, these particles move
faster. They would only stop moving at degrees C. ( 0C )
These particles are held together by forces of attraction, but never actually touch each other.

4. The States (or Phases) of Matter
Solids
solids have definite shape and definite volume
the particles in solids are held strongly in position, usually in some geometrical pattern like a crystal
the particles in a solid only move by vibrating - they can't leave their positions

5. The States (or Phases) of Matter
Liquids
liquids have definite volume, but take the shape of their container
the particles in a liquid are held closely together, but are free to move around
the particles have enough energy so that they are not locked in position

6. The States (or Phases) of Matter
Gases
gases have no definite shape or volume.
They will spread out to fill any container that they are in.
the particles of a gas are widely spaced, and are not held together at all
the particles of a gas are flying around very rapidly, at about 1000 km/h