Why wouldn't you use carbon-14 dating on a piece of shell that was estimated to be 1 million years old?
A. Sea shells do not have radioisotopes.
B. Uranium dating is better for items older than 1/2 million years.
C. Carbon dating is only useful on plants.
D. The amount of radioactive carbon in the sample would probably too small to measure.
E. Carbon dating can only be used on items that were once alive.
Answer: D
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In preparation for the construction of a new large subdivision, over 500 acres of hilly forest are cleared. In this cleared region, we will expect that
A) more species of birds and insects will inhabit the region. B) a drainage system and landscaping will need to be designed to limit erosion. C) the overall productivity of the region will increase. D) the levels of carbon dioxide in the air will sharply decline.
Photovoltaic cells are a component part of
A) nuclear power plants. B) geothermal energy generation. C) active solar energy systems. D) wind turbines. E) biomass collection.
How much of Earth's primary productivity is used or preempted by humans?
What will be an ideal response?
____________________ are placed on buildings to protect them from lightning damage
Fill in the blank with correct word.