What happens to the land surface when large ice sheets melt away?
A) It subsides because there is less ice on top.
B) The land surface remains unchanged but seems lower because of the loss of ice.
C) The land flexes upward due to isostatic rebound.
D) The land rises because the rocks are warmer without the ice.
C) The land flexes upward due to isostatic rebound.
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A diver who weighs 500 N steps off a diving board that is 10 m above the water. The diver hits the water with kinetic energy of
A) 10 J. B) 500 J. C) 510 J. D) 5000 J. E) more than 5000 J.
All atoms of the same element have the same atomic mass number. Indicate whether the statement is true or false
Which of the following is an intermediate in the citric acid cycle?
A) glutaric acid B) oxalic acid C) succinic acid D) valeric acid
Which statement about mitigation of climate change is FALSE?
a. ?The most direct way to slow the increase in greenhouse gases is to minimize population growth. b. ?Conservation is an expensive way to reduce carbon output used in power production. c. ?If the real costs of burning coal are included, the cost of wind energy is similar. d. ?Injecting aerosols such as sulfur dioxide into the atmosphere annually could block some of the sun’s incoming energy. e. ?There is considerable opposition to a carbon tax in the United States.