Temperature differences between nighttime and daytime on Earth are relatively small due to
A. seasonal fluctuations and Earth's magnetic field.
B. polar regions absorbing most solar energy.
C. Earth being 70% water.
D. Earth's relatively high daily spin rate and shortness of nighttime.
Answer: D
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A scientific theory must be:
a) Based on confirmed observations b) Able to explain ALL observations c) Consistent with every observation made and with every other scientific principle d) Internally consistent e) All of the above
All of the following are approaches to reducing eutrophication except ________
A) planting and maintaining vegetation buffers around ditches and streams that trap nutrient and sediment runoff B) upgrading stormwater systems to capture runoff from roads and parking lots C) applying fertilizers to farmland just before heavy rains are predicted D) using artificial wetlands to filter stormwater and farm runoff E) reducing fertilizer use on farms and lawns
Geologist use a scratch -test to determine the hardness of a mineral called the ____ scale
What will be an ideal response?
Figure 3.9 Natural capital: The main components of an ecosystem are energy, chemicals, and organisms.
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In the accompanying figure, notice that heat is lost by each component of the ecosystem, and that the sun is shown entering at only one point in the system. Explain how this is representative of the second law of thermodynamics.
What will be an ideal response?