1)
a. Physical property
b. Chemical property
c. Chemical property
d. Physical property
2)
a. Physical property
b. Physical property
c. Physical property
d. Chemical property
3)
a. Chemical change
b. Physical change
c. Chemical change
d. Physical change
4)
a. Chemical change
b. Chemical change
c. Physical change
d. Physical change
5. A is a chemical change because the color of the apple, which turned brown; it is also permanent. B is a chemical change because if they loose their charge, thermal energy has been given off and is not airborne. C is a physical change because the oils are removed, but the material doesn't change. D is a physical change because the salad dressing separates, but the material doesn't change.
6.
a. If you are baking chocolate chip cookies, you mix flour, milk, eggs, sugar, and chocolate chips together in a bowl. You must also separate the batter into little circles and put it in the oven to bake. Then the cookies must be taken out of the oven to cool so they are ready to eat.
b. Mixing the ingredients together is a physical change because though the ingredients are mixed, the materials don't change. Baking the cookies in the over is a chemical change because temperature is permanently changed and the cookies become a solid. Taking out the cookies to cool is a physical change because the cookies do not alter, even though they appear to.
7.
a. metals
b. non-metals
c. non-metals
d. metals
8.
a. metal
b. metalloid
c. non-metal
d. metal
9. Boron (B) and silicon (Si).
10.
a. idoine is a nonmetal, so it would shattter.
b. zirconium is a metal, so it would flatten.
c. phosphorus is a nonmetal, so it would shatter.
d. nickel is a metal, so it would flatten.
11. Nonmetals do not conduct electricity and are not malleable; thus, nonmetal wiring would not be able to bend or send off electricity.
12. Metals are suitable for use in coins because they do not break; yet, they are shiny, and are malleable.
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