1. deep ocean currents are driven by differences in

a. temperature, pressure, and ph
b. density, salinity, and temperature
c. the alignment of the sun, moon, and earth
d. evaporation, condensation, and precipitation

2. which of the following is not one of the three processes that were most intense during the first few hundred thousand years of the earth's history?

a. radioactive decay of unstable isotopes
b. cooling of the mantle
c. extraterrestrial impacts
d. gravitational contraction of the earth's interior

3. wilson's farm is in the mountains of arizona. byron's farm is in the flat plains of kansas. which of the following statements is true?

a. wilson's farm has more fertile soil than byron's farm.
b. wilson's farm would be more likely to have coarse soil than byron's farm.
c. plucking and hydraulic action are problems on wilson's farm.
d. slides, slumps, and rock falls are problems on byron's farm.

4. select all of the answers that apply.

is one of the primary ways that heat can be transferred.

a. conduction
b. convection
c. transpiration
d. respiration
e. radiation
f. sublimation

5. which of the following cycles don't cycle through the atmosphere?

a. water cycle
b. nitrogen cycle
c. carbon-oxygen cycle
d. phosphorus cycle