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.
b. Physical property.
c. Physical property.
d. Chemical property.
3.
a. Chemical change.
b. Physical change.
c. Chemical change.
d. Physical change.
b. Physical change.
c. Chemical change.
d. Physical change.
4.
a. Chemical change.
b. Chemical change.
c. Physical change.
d. Physical change.
b. Chemical change.
c. Physical change.
d. Physical change.
5.
a. The gases from the atmosphere react with the inner layer of the apple, causing decay.
b. The energy from flashlight batteries are drained, and the reaction is reversed to extract electricity from the battery.
c. The clothing still maintains its original form, but the oils are removed.
d. The mixture will suspend with the container, and a chemical reaction fails to occur.
b. The energy from flashlight batteries are drained, and the reaction is reversed to extract electricity from the battery.
c. The clothing still maintains its original form, but the oils are removed.
d. The mixture will suspend with the container, and a chemical reaction fails to occur.
6.
- Preheat oven to 350 degrees. In a small bowl, whisk together the flour and baking soda; set aside. In the bowl of an electric mixer fitted with the paddle attachment, combine the butter with both sugars; beat on medium speed until light and fluffy. Reduce speed to low; add the salt, vanilla, and eggs. Beat until well mixed, about 1 minute. Add flour mixture; mix until just combined. Stir in the chocolate chips.
- Drop heaping tablespoon-size balls of dough about 2 inches apart on baking sheets lined with parchment paper.
- Bake until cookies are golden around the edges, but still soft in the center, 8 to 10 minutes. Remove from oven, and let cool on baking sheet 1 to 2 minutes. Transfer to a wire rack, and let cool completely. Store cookies in an airtight container at room temperature up to 1 week.
7.
a. metals.
b. nonmetals.
c. nonmetals.
d. metals.
b. nonmetals.
c. nonmetals.
d. metals.
8.
a. metal.
b. metalloid.
c. nonmetal.
d. metal.
b. metalloid.
c. nonmetal.
d. metal.
9.
1) Silicon: Si
2) Arsenic: As
2) Arsenic: As
10.
a. it would shatter (brittle).
b. it would flatten (malleable).
c. it would shatter (brittle.
d. it would flatten (malleable).
b. it would flatten (malleable).
c. it would shatter (brittle.
d. it would flatten (malleable).
11. Nonmetals do not conduct electricity and are not malleable. Nonmetal wiring therefore couldn't conduct electricity.
12.
1) Metals are malleable, therefore, they can be engraved with currency symbols and political leaders.
2) Metals are shiny in color and make more attractive coins!
3) Metals aren't easily shattered or broken, for they aren't brittle like nonmetals.
2) Metals are shiny in color and make more attractive coins!
3) Metals aren't easily shattered or broken, for they aren't brittle like nonmetals.
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