Modules 24 and 25 Review

What causes the layers of the Earth to be separated from one another?

• Their thickness

• Their names

• Their temperature

• Their density

Which layer contains magma that circulates in convection cells?

• A

• B

• C

• D

Which letter represents the crust?

• A

• B

• C

• D

Which type of plate boundary creates mountains?

• Convergent

• Divergent

• Transform

• Both convergent and divergent

The Earth's layers can be separated chemically or physically. What physical layer of the Earth contains convection currents of magma? Hint: It is within the mantle layer!

• Lithosphere

• Asthenosphere

• Mesosphere

• Core

Several pieces of evidence suggest that the continents used to be attached together as a superconinent (Pangaea). Which piece of evidence is shown in the image?

• Matching mountain ranges between England and the United States

• Identical rocks found in Africa and Antartica

• Radioactive dating of rocks on multiple continents

• Matching fossils found in South America and Africa

What causes magma to create convection currents ?

• Coriolis effect causing the plates to shift

• Earthquakes creating friction and heating up the magma

• Heat produced by radioactive decay within the core

• Volcanoes releasing carbon dioxide into the atmosphere

Subduction is the process of where the less dense plate is pushed into the asthenosphere and melts, forming volcanoes. Subduction occurs at which type of plate boundary?

• Divergent

• Transform

• Convergent

Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. Seafloor spreading occurs at which type of plate boundary?

• Divergent

• Transform

• Convergent

Identify the correct combination of rock type and the process that created it.

• Igneous: weathering and erosion

• Metamorphic: melting

• Sedimentary: compaction