Unit 2 SAS #1-12 (pg. 130)

1. a. physical    
    b. chemical    
    c. chemical   
    d. physical 

2. a. physical 
    b. physical  
    c. chemical  
    d. chemical 

3. a. chemical  
    b. chemical  
    c. physical 
    d. physical

4. a. physical 
    b. physical 
    c. chemical
    d. physical

5. In number 4, the answers that were physical changes were that because the materials were the same but they looked like they had changed. The answers that were chemical changes were that because the substance had changed into a new substance. 

6. a. Cream together the butter, white sugar, and brown sugar until smooth. Beat in the eggs one at a time, then stir in the vanilla. Dissolve baking soda in hot water. Add to batter along with salt. Stir in flour, chocolate chips, and nuts. Drop by large spoonfuls onto ungreased pans - chemical change
    b. Bake for 10 minutes in the oven, or until edges are nicely browned - physical change

7. a. metal
    b. nonmetal
    c. nonmetal
    d. metal

8. a. metal
    b. metalloid
    c. nonmetal
    d. metal

9. a. Boron - B
    b. Silicon - Si

10. a. shatter
      b. not shatter
      c. shatter
      d. not shatter

11. They don't conduct electricity and they don't bend, they shatter. 

12. They are durable, some aren't as chemically reactive as others, and they last a long time.