Which two countries dominated the "Cold War?"
A) China and USSR
B) USSR and Cuba
C) USSR and United States
D) United States and Cambodia
E) China and United States
Answer: C
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Which of the following describes the concentration of CO2 in the lower atmosphere?
A. It is 30 percent higher than it was 300 years ago. B. It has stabilized. C. It is not related to the amount of forest cover on Earth. D. The present average measurement is 150 ppm.
One possible way to decrease the magnitude of an earthquake is to ____
A)build more earthquake-proof structures B)replace rigid soil with soil that will liquefy during an earthquake C)use drilling equipment to dig into fractured rock and release pressure D)inject fluid into fractured rocks E)inject concrete into fractured rocks
Describe the effects of thermal expansion, conduction of heat, and viscosity on the determination of whether heat transfers through material by conduction or convection
What will be an ideal response?
A parcel of air at the surface is heated which expands the air and increases the parcel's volume. If the same number of air molecules occupy the greater volume, density decreases. The increase in volume results in lower pressure. What will happen to the air surrounding this parcel?
A. Less dense air flows in to replace the rising air. B. Denser air flows in to replace the rising air. C. More dense air rises at the surface. D. Less dense air sinks at the surface.