NJSLA Review 33

Which of the following is evidence that supports the theory of plate tectonics?

• Earth has both oceans and landmasses.

• Ocean storms have eroded shorelines in only a few hours.

• Meteors have created large impact craters in a matter of seconds.

• The positions of continents have changed over hundreds of millions of years.

Which statement explains how major mountain chains form?

• When tectonic plates collide, rock is compressed and pushed up.

• Softer rock is eroded away, leaving harder rock behind as mountains.

• Continental tectonic plates become thicker over time, creating mountains.

• Tectonic plates rise from deep in the Earth and are pushed up above Earth's surface.

What evidence could support the conclusion that a stream channel is eroding?

• Sand or smaller particles in the water

• Widening or deepening of the stream channel

• An accumulation of sediment, or delta, where the stream enters a body of still water

• All of the above

Which geologic process can occur over both very short and very long timescales?

• Erosion

• Earthquakes

• Meteor impacts

• Mountain building

How and why will Earth's continents move in the future?

• They will remain where they are because they have reached an equilibrium point.

• They will move slowly over millions of years because Earth's tectonic plates will continue to move.

• They will move more quickly than they did in the past because of global warming and rising sea levels.

• They will move more slowly than they did in the past because the ocean basins are keeping them separated.

Which surface feature could result from erosion of a mountain?

• Delta

• Crater

• Volcano

• Sea cliff

Which geologic processes are associated with meteor craters?

• Erosion and deposition

• Earthquakes and landslides

• Weathering and sinkhole formation

• Plate tectonics and volcanic eruptions

Scientists studying Mars found rocks that look similar to rocks found in streambeds on Earth. Scientists have not found any water on Mars. What conclusion can we make based on this evidence?

• There must be liquid water on Mars that the scientists have not yet found.

• The channels could not have been made by water because the water would still be there.

• The channels must have been made by water, but the environment has changed so that the water dried up or froze.

• None of the above