20. lines on a map that run parallel to the equator are known as
a. lines of longitude.
b. the prime meridian.
c. lines of latitude.
d. cartography

18. the two subspecialties of astronomy are
a. paleontology and geochemistry.
b. astrophysics and planetary science.
c. climatology and atmospheric chemistry.
d. environmental earth science and environmental chemistry

13. weight is best described as
a. the interval between two events.
b. the amount of surface included within a set of boundaries.
c. the amount of matter in an object.
d. a measure of gravitational force on an object.

12. what statement best describes an independent variable?
a. the factor that's changed by the experimenter and impacts the constant in an experiment
b. the factor that isn't changed by the experimenter and is impacted by the dependent variable
c. the factor that doesn't change, but impacts the constant in an experiment
d. the factor that's changed by the experimenter and impacts the dependent variable

11. magma is classified as basaltic, andesitic, or rhyolitic based on what factor?
a. temperature of the magma
b. amount of silica it contains
c. amount of pressure placed on it during formation
d. region of the earth in which it formed

10. a/an bond allows metals to conduct electricity.
a. covalent
b. metallic
c. ionic
d. atomic

3. there are gps satellites orbiting the earth.
a. 10
b. 28
c. 42
d. 24

2. the is a factor that's affected by changes in the independent variable.
a. hypothesis
b. dependent variable
c. control
d. experiment