1. Properties of Matter
Chapter 17 section 2

2. Properties of Matter
Physical properties-Any characteristic of a material that you can observe without changing the identity
You can separate materials by appearance
Appearance is how they look
State of matter-Solid, Liquid, or Gas
Color
Size (be careful to be specific about size!!!!)

3. Properties of Matter (Cont)
You can also separate materials by their behavior
Behavior is how specific materials react
Whether something is magnetic
Whether something can bend or is flexible
Whether something can be stretched or drawn into wire

4. Physical Changes
A physical change is a change in size, shape, or state of matter
Solid to a liquid to a gas
This is a change in the energy but not the substance
How can you use a physical change to separate salt water into drinking water?
Partner up and come up with an explanation of how to turn salt water into drinking water

5. Chemical Properties
A chemical property is the characteristic of a substance that will allow it to undergo a chemical change
A chemical change means that a new substance is being formed
When a chemical change occurs you usually see heat, light, sound, smell, bubbling or a color change (meaning a new color is formed)
You may see a combination of any of the above

6. Physical/Chemical Changes Lab
You will be performing a 2 part lab to observe chemical and physical changes
You will mix 3 different powders with 3 different liquids and note any physical or chemical changes that occur
You will then be given 3 unknown substances (that may be mixed) and it will be your job to identify what the mixtures are and give an explanation as to why you believe your conclusion is correct
Lab Procedure

7. Weathering
Weathering occurs when the environment is changed because of the surrounding weather
Can be a physical or chemical change
Physical Change-Water gets into a crack in a rock, the water then freezes and the rock breaks into smaller piece or erosion from a river
Chemical Change-Slightly acidic rain mixes w/ limestone to create calcium hydrogen carbonate

8. Conservation of Matter
Law of conservation of matter states that matter can not be created or destroyed only transformed
The total amount of matter before a reaction is equal to the total amount of matter after a reaction
When you burn a piece of paper what is happening to the paper and where is the mass going?