1. Bell Ringer What is the contour interval for this map?
*Hand back graded work

2. Chemistry Basics

3. Matter Matter – anything that has mass and volume
Made of substances called elements
Element -- substance that cannot be broken down to simpler substances by any means

4. Matter
The elements hydrogen and helium make up about 99.8% of the elements in the universe (mostly stars)

5. Matter
The two most common elements on Earth are oxygen and silicon, found mostly in rocks and minerals
Other common elements on Earth: aluminum, iron, calcium, sodium, potassium, & magnesium

6. Matter Compounds – substances made of two or more combined elements
Example: carbon dioxide, CO2, is made of the elements carbon and oxygen

7. Properties of Matter
Chemical property – a substance’s characteristic that indicates whether it can go through a chemical change
Examples: flammability, oxidation (reaction with oxygen)
Physical property – a substance’s characteristic that can be observed without changing the substance’s identity
Examples: color, shape, size, phase of matter

8. Properties of Matter
Chemical change (chemical reaction) – a change from one substance to another substance
Physical change – changing a physical property of matter without changing the type of matter
Example: phases changes (ice, water, and steam are all still chemically H2O) =
Ice, water, steam… physically different, but all still chemically the same

9. Properties of Matter
Law of Conservation of Matter – matter may chemically or physically change, but the quantity stays the same (matter is NOT created or destroyed)

10. Phase Changes
Four phases of matter in the universe – solid, liquid, gas, and plasma
A substance changes to different phases of matter with the addition or removal of heat

12. Phase Changes Plasma – superheated gas particles (temps > 5000oC)
So hot they glow
Examples: stars, lightning, and neon lights

13. Phase Changes 5. 4. 3.
Evaporation 1. 2.

15. Take a few minutes to prepare for quiz.
Any questions?
Testing Procedures