What happens to snowflakes as they become progressively buried within glaciers?
A. They can become brighter white because of trapped air.
B. They become less dense because of large amounts of trapped air.
C. They begin to melt as they are insulated from the cold air.
D. They become interlocking crystals of ice.
E. All of these choices are correct.
Answer: D
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Which statement about urban areas is supported by environmental analysts?
A. Most of the world's urban areas are not environmentally sustainable in the long run. B. Most of the world's urban areas are environmentally sustainable in the long run. C. Since the ecological footprint of a city does not extend beyond its border, cities are models of sustainability. D. The only truly sustainable places occur in large urban areas.
Which of the actions belong to the components of deformation?
a. Displacement b. Rotation c. Evaporation d. Distortion e. Both a, b, and d
How old is Earth?
a. 4.6 billion years old b. 4.6 million years old c. 460 million years old d. 4600 years old e. 46 billion years old
Up until 1993 New York City dumped which of the following into the coastal ocean?
A) Industrial chemicals B) Oil dispersants C) Pesticide D) Sewage sludge E) Waste oil