Which of the following is the SI unit of radiation activity?
A) the becquerel
B) the curie
C) the millicurie
D) the roentgen
B
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Approximately what percentage of the human diet should be protein?
A) 10% B) 20% C) 50% D) 70%
Chinook winds are ____
a. cold, moist, and upslope winds b. warm, dry, and downslope winds c. cold, dry, and downslope winds d. warm, moist, and upslope winds
Imagine that this piece of paper is illuminated with white light and appears red. You see red light because the paper ____
a. absorbs red and reflects other visible wavelengths b. emits red light c. reflects red and absorbs other visible wavelengths d. disperses white light e. transmits red light
How are silt deposits called loess related to glaciers?
A. They are wind-blown accumulations and commonly are derived from glaciers. B. They form in lakes as the lakes dried up at the end of the ice ages. C. They were deposited by large glacially caused floods in the Pacific Northwest. D. They accumulate in lakes trapped behind glaciers.