This type of dating uses radioactive elements and their decay products to determine an absolute age for an earth material.
A. Fossilization Timing
B. Superposition
C. Radiometric Dating
D. Relative Dating
E. Petrographic Dating
Answer: C
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Practitioners of shifting cultivation usually begin the process of clearing a new field when
A) the government tells them to do so. B) they are certain the last frost is past. C) the soil of the old field is depleted of nutrients. D) the women vote to do so. E) seasonal and annual rainfall patterns shift.
The term "clay" refers to both texture and mineralogy
Indicate whether the statement is true or false
Ground-source heat pumps use the difference in temperature between the air and soil to warm and cool buildings
The upper 10 ft of the Earth is always at a constant temperature of ________, which is ideal for warming buildings in the winter and cooling them in summer. A) 50-60°F B) 100-20°F C) 70-80°F D) 225-60°F E) over 360°F
Which of the following scenarios best describes a density-dependent factor limiting population growth?
A) A particularly dry summer shrinks and dries up many ponds in central Canada, causing increased aggression and competition for limited nest sites among female common goldeneyes (ducks). B) A particularly snowy winter makes it difficult for female deer to find food, thus affecting their ability to reproduce. C) A tropical storm strikes one of the Hawaiian Islands and wipes out a population of nénés that had been recovering from near-extinction. D) An April blizzard kills off many migrating barn swallows, which could not tolerate the cold and snow. E) A homeowner sprays her lawn with broadleaf herbicide to kill the dandelions that have started growing there that spring.