Radon gas can accumulate in people's homes and pose a serious lung cancer risk. What is the source of the radon gas?
A. contaminated groundwater surrounding nuclear power plants
B. byproduct from the breakdown foam insulation used in home construction
C. byproduct from the breakdown of asphalt roofing shingles used in home construction
D. radioactive decay of uranium minerals found in rocks and sediment
E. breakdown of natural gas deposits
Answer: D
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________ growth implies that a constant percentage of humans are added each year
Fill in the blank(s) with correct word
This figure shows plate boundaries south of Alaska. Which location is likely to contain volcanoes above a subduction zone?
A. 1 B. 2 C. 3 D. 4 E. 2 and 3
Ocean life appears to be affected by a relatively small number of variables such as temperature, density, available sunlight, available nutrients. If any one of these variables changes how do you think it might it impact the human food web?
What will be an ideal response?
Name two features defined by the principle of cross-cutting relationships
A) convergent tectonic plates and faults B) faults and dikes C) dikes and sills D) convergent tectonic plates and sills