Sound and light waves bend because they travel at different speeds in different media
a. True
b. False
True
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When an alpine glacier flows through a valley, it makes the valley wider by
A. plucking. B. abrasion. C. deposition. D. dissolving.
The ocean is stratified with respect to ____
A) pH and light transmission B) temperature and salinity C) the amount of dissolved oxygen D) the amount of dissolved carbon dioxide
Why did the population of Jews in Europe drop from 9.5 million before World War II to less than 2 million today?
A) Their birth rates dropped as their urbanization rate increased, and the creation of Israel caused most to emigrate to the Middle East. B) The creation of Israel caused most Jews to emigrate from Europe to the Middle East. C) Their birth rates dropped as rates of urbanization increased. D) German Nazis murdered approximately 6 million Jews in the Holocaust. E) All of the choices are correct.
Which of the following might be first to populate an area after glaciers melt in response to global climate change?
A) lichens B) shrubs C) aspen trees D) grasses