Unit Test Answers

According to the theory of plate tectonics, which is one feature that plates carry?

What is the orientation of the magnetic stripes of iron contained in rocks that support the idea of seafloor spreading?

What happened to the giant landmass that Wegener described?

Which statement explains what happens to older crust during seafloor spreading?

Which word identifies the shaking that results from movement under Earth’s surface?

The table shows the thickness, top density, and bottom density of the different layers of the Earth. Thickness (km)Density (g/cm3)Types of Rock FoundTopBottomCrust302.22.9Silicic rocksUpper mantle7203.44.4PeridotiteLower mantle2,1714.45.6Magnesium and silicon oxidesOuter core2,2599.912.2Iron+oxygenInner core1,22112.813.1Iron+oxygen

Which word identifies the agent that carries the energy released from earthquakes?

Which type of volcanic mountain has wide, gentle slopes?

Why do scientists study seismographs?

Which statement describes the location of an earthquake’s epicenter?

How long ago do scientists believe the continents formed Pangaea?

Which example is indirect evidence used to study Earth’s interior?

The image shows a volcanic eruption.

Which features form along all types of plate boundaries?

Which coal field location is related to coal fields in the United States and supports the theory of continental drift?