A "weightless" astronaut in an orbiting shuttle is
A) shielded from Earth's gravitational field.
B) beyond the pull of gravity.
C) pulled only by gravitation to the shuttle which cancels Earth's gravitational pull.
D) like the shuttle, pulled by Earth's gravitation.
E) none of the above
D
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Sea breezes
A) occur because warmer air is denser and settles to the surface of the land. B) tend to cause higher temperatures on land as winds blow towards the sea. C) result from water heating and cooling faster than land surfaces. D) form because of higher pressure over the land than the sea. E) involve onshore (toward the land) air flows that often develop in the afternoon.
What would happen to a river delta if damming reduced the amount of sediment in the river?
a) Nothing much would change because the water flows through the delta. b) The delta would stop growing. c) River water quality would improve. d) The delta would continue to grow as long as the river flows. e) The delta would erode and subside below sea level.
The upper groundwater zone above the water table where pore spaces may be filled with air as well as water is termed the zone of:
a. Aeration b. Artesian water c. Precipitation d. Saturation
Increasing the concentration of carbon dioxide in the atmosphere decreases the amount of shortwave radiation that reaches the Earth's surface
Indicate whether the statement is true or false