Which of these can be used to measure atmospheric pressure?

All of the following are sources of energy derived from the ocean except —

A star might be much brighter than it appears to be. This is called the star’s absolute magnitude. The difference in apparent magnitude and absolute magnitude is due primarily to the star’s —

Water vapor is lighter than many atmospheric gases such as oxygen, nitrogen, and carbon dioxide. Why then doesn’t water vapor rise above these other gases to a higher level of the atmosphere?

The presence of many metamorphic rocks in Virginia is an indication that the area has been subjected to —

About how long does it take the Earth to make one complete rotation on its axis?

Which of these energy sources produces the least harmful environmental effects?

All of the following support the theory of continental drift except that —

The Southern Hemisphere is warmer in January than in July because —

Only 3% of the Earth’s water is fresh water. The world’s oceans contain the rest of the Earth’s water. Of that 3%, three-fourths is tied up in glaciers, ice caps, and snow fields. Antarctic glaciers contain nearly 85% of all the ice in the world, and floating sea ice in the Arctic contains 10% of the ice. Sea ice freezes from ocean water, but the salt is excluded in the freezing process, resulting in mostly freshwater ice. Where is the remaining 5% of the world’s permanent supply of ice and snow?

Oil spills have a tremendous impact on the ocean environment, and the oil must be cleaned up after these spills. A new technique for cleaning oil from beaches is called bioremediation. This technique uses naturally occurring bacteria to break down the oil. How is this accomplished?

A student sees a very bright star in the sky and thinks it might be the planet Venus. Which observation would lend support to this conclusion?

Sinkholes associated with natural processes are characteristic of what type of bedrock?

Geologists think that parts of the Appalachian Mountains formed originally from sediments accumulating in shallow swamps. The weight of the sediments caused the area beneath them to sink, allowing more sediments to accumulate. The process continued until many layers had formed. Then tectonic processes folded the layered sediments into a range of mountains. What evidence for this theory can be found in the current structure of these mountains?

Which of the following is an example of chemical weathering?

Moist air from the Pacific Ocean rises and cools as it passes from west to east over the Sierra Nevada Mountains. Once it is over the mountain range, the air descends and warms on the other side. What is the result of the air ascending, then descending over the mountains?

Because granite cools below the surface of the Earth, it is —

Fish are abundant in areas where the ocean is upwelling because it —

Many quarries in Virginia produce crushed stone. What industry uses the most crushed stone?

All of the following are characteristics of metamorphic rocks except —

Not all fossils have been preserved inside soil or rock. Explorers in Siberia have discovered the bodies of ancient mammoths so well-preserved that the flesh could be eaten. What do you think preserved the mammoths in such a perfect state?

What is the fewest number of seismographic stations that must record the arrival time of P and S waves in order for the epicenter of an earthquake to be located?

The amount of power that can be generated by a hydroelectric dam would be most dependent on which two factors?

A person weighs more on the Earth than on the moon because the Earth has a greater —

The mineral resources of Virginia can be conserved by doing all of the following except —

A boat will float higher in the Atlantic Ocean than it will in the Potomac River because ocean water has —