What are longshore currents, and how do they form? Why are they important to shoreline processes? What will be an ideal response?
Waves strike the shore at some angle, causing the water between the breaker zone and the beach to
flow parallel to the shoreline. These long, narrow currents are longshore currents, and they flow in the
same general direction as the approaching waves. These currents continuously move sediment into and
away from beach systems.
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Which of the following statements accurately compares the frequency of lightning discharges within a cloud and cloud-to-ground lightning?
A. Discharges within a cloud are more frequent. B. Discharges within a cloud are about as frequent. C. Discharges within a cloud occur rarely. D. Discharges within a cloud are less frequent.
What is the effect of removing material from the downslope end of a landslide? What will be an ideal response?
Net primary productivity is measured in ________ per year
A) watts B) watts per square meters C) kilograms per square meter D) kilograms E) centimeters
The phenomenon causing the greenhouse effect is that ________ in the lower atmosphere selectively absorb(s) reradiated ________ radiation.
A. Ozone; visible light B. Hydrocarbons; very short wavelength C. Carbon dioxide; ultraviolet D. Carbon dioxide, methane, and other gases; infrared (heat) E. Carbon dioxide, methane, and other gases; insolation