1. What do water, air, and hydrogen have in common?

2. Pure Substance or Mixture?
While visiting the various items throughout the lab, place each item under what you think it should be categorized as below (without looking it up on your phone) Pure Substance Mixture

3. Pure Substance
Mixture

4. Matter

5. Element Compound

6. Heterogeneous Homogeneous Mixture Mixture

7. Review Questions
How do you tell the difference between the two types of mixtures?
How do you tell the difference between the two types of pure substances?
Is air considered matter? Why or why not?
Is light considered matter? Why or why not?
Why do you think matter is important in this class?