The current ice age
A) began around 38-55MYA.
B) began during the Pleistocene.
C) came about rapidly.
D) had a uniform drop in temperature.
Answer: A
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The fee-per-____ waste collection systems charge consumers for the amount of waste they throw away.
A. unit B. product C. material D. energy E. bag
When there is an equilibrium between water in the air and water in the ocean, the air is said to be ____________________
Fill in the blank(s) with correct word
One important limitation when using potassium-argon for age-dating is that ________
A) potassium decays twice as fast as other isotopes B) potassium can only age-date rocks younger than 70,000 years old C) argon is a gas and may leak from minerals, throwing off measurements D) argon is unstable at surface conditions and easily weathered from rocks
In designing a retaining wall to support an unstable slope, the best design would be
A. any of these; all would be equally effective. B. a high, thin, impermeable wall. C. a high, thin wall with drainage holes. D. a short, stout wall at the foot of the slope.