2SAS #1-12 p.130

1. a. physical 

    b. chemical 

    c. chemical

    d. physical 

2. a. physical 

    b. chemical

    c. physical 

    d. chemical

3. a. chemical

    b. chemical

    c. physical

    d. physical 

4. a. physical (color change)  

    b. chemical (trait in chem. makeup)

    c. physical (removes a substance) 

    d. physical (separates) 

5. In number 4. 

6. 1) Adding ingredients into a mixing bowl, and beginning to mix- 

    2) Shaping cookies.

    3) Pre-heating oven.

    4) Putting the cookies into the oven.

    5) Cookies baking and shaping in the oven.

    6) Removing cookies from oven.

    7) Cookies cooling down. 

7. a. metals

    b. metalloids 

    c. nonmetal 

    d. metals

8. a. metal

    b. metalloid

    c. nonmetal

    d. metal

9. Si- silicon, B- boron. 

10. a. shatter into pieces

      b. will flatten without being shattered.

      c. shatter into pieces 

      d. will flatten without being shattered 

11. Two properties that make nonmetals unsuitable for electric wiring are that they are brittle and they do not conduct electricity. 

12. Three properties that make metals suitable for use in coins are their luster, their malleability, and their durability.