1. Matter and Mass Week 2

2. Mass The amount of matter in an object Measured using a triple beam balance Measured in units called grams Can use a double pan balance to compare the mass of two objects

3. Matter Three states of matter: solid, liquid, gas Has mass Takes up space

4. States of Matter A. The Kinetic Theory 1. All matter is composed of small particles (atoms, molecules, or ions). 2. They are in constant, random motion. 3. They constantly collide with each other and with the walls of their container.

5. Three States of Matter Matter can be sorted or classified into three groups. –Solids –Liquids –Gases

6. Solid Definite Volume –Volume: the amount of space an object takes up Definite Shape Are usually hard because their molecules are packed together. –Molecule: the small particle of a substance What are some examples of a solid found in our classroom? Can liquids become solids?

7. Liquid Definite volume No definite shape (takes the shape of the container) What are some examples of liquids you could find in the cafeteria? Liquids can become solids or gases

8. Gas Does not have a definite shape Does not have a definite volume Can you think of any examples of a gas?

9. Changing States of Matter http://myweb.tiscali.co.uk/nickpower/web- content/chempmf.htmlhttp://myweb.tiscali.co.uk/nickpower/web- content/chempmf.html

10. Physical Properties Senses –Sight (What it looks like) –Touch (What it feels like) –Taste (sweet, sour, salty, bitter) –Smell (Does it have an odor? Pleasant, unpleasant) Physical Properties of matter –Color, size, shape, volume, magnetism

11. Balance Scientific Tool Measures Mass