In the United States, summers are warmer than winters because
A) the Earth is much closer to the sun in summer.
B) the northern hemisphere is closer to the sun.
C) the sun's rays shine more directly onto these regions in summer.
D) there are usually fewer clouds in the troposphere in the summer.
C
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What would a night time satellite image of Egypt reveal?
A. randomly scattered lights; faint, no real pattern B. a string of lights east and west along the coast C. a fairly uniform distribution of light throughout the country D. a snake of light along the Nile River, surrounded by deep darkness
Many shoreline shapes represent a dynamic balance between sediment delivered to the shore by streams and erosion from wave action. Explain how a beach or spit might change over time because of variations in these two processes
What will be an ideal response?
Ecosystem boundaries are usually defined by easily identifiable demarcations.
Answer the following statement true (T) or false (F)
Energy flow in an ecosystem is ________
A) bi-directional B) cyclic C) semi-conservative D) top down E) unidirectional