Surface runoff will be greatest when the

(1) rainfall is light and the ground is permeable

(2) infiltration rate is greater than the rainfall rate

(3) slope of the land is too great to permit infiltration

(4) ground is permeable and unsaturated

Is the infiltration of water greatest on steep, rocky slopes or on gentle, sandy slopes? Defend your answer.

Surface runoff of precipitation occurs when

(1) porosity is exceeded by permeability

(2) the infiltration rate is greater than the precipitation rate

(3) the precipitation rate is greater than the infiltration rate

(4) the evaporation rate is increased.

The best evidence that erosion has taken place would be provided by

(1) deep soil formed in place on a hillside

(2) sediment observed at the bottom of a cliff

(3) folded rock layers observed on a mountain

(4) faulted rock layers observed on a plateau.

What is the largest source of the moisture for the atmosphere

The rate of flow of water through rock is determined by the

(1) types of minerals that make up the rock

(2) total amount of space between mineral grains

(3) number of connected pore spaces and their sizes

(4) position of the rock with respect to the water table

Write a brief statement summarizing the results of your permeability experiment.

Of the three materials you tested (coarse sand, fine sand, and soil), which has the greatest permeability?

The highest dew point ever recorded was $95^{\circ} \mathrm{F}$, recorded in Saudi Arabia. Was the air humid or dry at that time? Explain your reasoning.

Suggest a reason different amounts of water were recovered in the beaker for each material that was tested.

Suggest a reason why different amounts of water were recovered in the beaker for each material that was tested.

Which event is a direct result of evaporation and transpiration?

(1) The atmosphere warms.

(2) Cloud cover decreases.

(3) Moisture enters the atmosphere.

(4) Moisture leaves the atmosphere.

Most of the Gulf Stream ocean current is (1) warm water that flows southwestward (2) war.tn water that flows northeastward (3) cold water that flows southwestward (4) cold water that flows southeastward

The primary source of moisture for the local water supplies is.

(1) potential evaporation and transpiration

(2) actual evaporation and transpiration

(3) ground water storage

(4) precipitation