Earth Structures

Which of the following lists the layers of Earth in order of density, from the least dense layer to the densest layer?

• mantle, crust, outer core, inner core

• inner core, outer core, mantle, crust

• crust, outer core, inner core, mantle

• crust, mantle, outer core, inner core

What does the theory of plate tectonics predict about the locations of earthquakes and volcanic eruptions?

• they are evenly distributed

• they occur mostly on the ocean floow

• the occur mostly on the continents

• they occur mostly at plate boundaries

The diagram below shows layers of undisturbed sedimentary rock. According to the diagram, which statement about the fossils in these rock layers are accurate?

• 
• Fossil 4 is older than fossil 1

• Fossil 2 is younger than fossil 3

• Fossil 5 is younger than fossil 2

• Fossil 2 and 5 are about the same age

Which type of rock may form when rock particles are deposited and pressed together over a very long time?

• igneous

• metamorphic

• magma

• sedimentary

Both continental drift and plate tectonics

• are theories that explain how Earth's plates formed

• are processes that cause convection in the asthenosphere

• help explain how Earth's surface has changed over time

• are used to explain weather patterns

Which of these processes is MOST LIKELY at a boundary where two oceanic plates are moving apart?

• folding

• sea-floor spreading

• subduction

• faulting

Which process causes material in the mantle to flow like a very thick liquid?

• convection

• continental drift

• deposition

• folding

Which of these human activities is MOST LIKELY to affect the balance of carbon dioxide and oxygen in the atmosphere?

• irrigation

• deforestation

• use of pecticides

• use of fertilizers

When two continental plates converge, which geologic feature is most likely formed by the process?

• the folded Himilayan mountains

• volcanic islands of Hawaii

• the Mid Atlantic Ridge

• the San Andreas Fault

Which of these processes help form metamorphic rock?

• deposition

• subduction

• erosion

• weathering