What is the proposed mechanism for plate movement?

• Convection currents in the mantle

• Gravitational pull from the moon

• Magnetic field interactions

• Solar wind impact

It is Aprox km to the center of Earth.

(a)  

• 6300
• 2000
• 5500
• 3000

The feature that separates Earth's crust and uppermost mantle from the asthenosphere is the ______.

• Lithosphere

• Mesosphere

• Troposphere

• Stratosphere

What evidence supports the seafloor spreading hypothesis?

• Tsunamis occurring when the land splits

• Fossil records

• Distribution of mountain ranges

• Ultra sound imagery of the ocean floor

The epicenter of an earthquake is ______.

• the point on the Earth's surface directly above where the earthquake occurs

• the point within the Earth where the earthquake rupture starts

• the scale used to measure the magnitude of an earthquake

• a device used to detect and record earthquakes

What property was first used to identify Earth's layers?

(a)  

• density
• color
• temperature
• age

Which evidence was NOT used by Wegener to support the continental drift hypothesis?

• Fit of the continents

• Fossil evidence

• Distribution of rock layers

• Satellite data

Which seismic waves travel the fastest within Earth's interior?

Describe the differences between Earth's inner and outer cores.

How do seismic waves help us learn about Earth's interior?