How many soil conservation districts are there across the United States today?
A. at least 100,000
B. about 100
C. more than 50
D. more than 3000
Answer: D. more than 3000
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Aluminum has a specific heat capacity more than twice that of copper. Place equal masses of aluminum and copper wire in a flame and the one to undergo the fastest increase in temperature will be
A) copper. B) aluminum. C) both the same
Horse latitudes at sea correspond to ____ on land
a. tropical rainforests b. great deserts c. glaciers d. mountain ranges
A polar jet is a belt of winds about 600 miles wide, flowing as fast as ________ in its central "core."
A. 400 km/hr B. 4 km/hr C. 40 km/hr D. 4,000 km/hr E. half of the speed of light
Which of these numbered features contains most of Earth's water?
A. 1-oceans B. 2-atmosphere C. 3-glaciers and ice sheets D. 4-groundwater E. 5-lakes