Plate Tectonics Convection

Scientists think that convection currents that move the plates flow in Earth's

• Continental crust

• Oceanic crust

• mantle

• outer core

Tags

NGSS.MS-ESS2-3

The mantle of Earth is made partly of magma. When magma rises and sinks, this is called ______________.

• a conduction current

• a hot spot

• a volcanic eruption

• a convection current

Tags

NGSS.MS-ESS2-1

When the force of gravity pulls a lithospheric plate downward and away from a ridge pushing it toward a trench.

• Sea Floor Spreading

• Subduction

• Ridge Push

• Slab Pull

Tags

NGSS.MS-ESS2-3

NGSS.MS-PS2-4

When the force of subduction and gravity moves a lithospheric plate downward into a trench and pulls it away from a ridge.

• Sea Floor Spreading

• Subduction

• Ridge Push

• Slab Pull

Which theory of plate movement occurs at the mid ocean ridge?

• convection
• ridge push
• slab pull

Which Theory of plate movement occurs as oceanic crust moves away from the mid-ocean ridge and becomes cooler and more dense, sinking into a trench?

• convection

• ridge push

• slab pull

Tags

NGSS.MS-ESS2-3

What are the main causes of convection currents in the asthenosphere?

• Density and temperature
• Density and weight
• Temperature and pressure
• Pressure and density

Where does convection occur?

• Asthenosphere
• Lithosphere
• Mesosphere
• Crust

Which of the following is a result of gravity in relation to moving tectonic plates?

• Earth's magnetic field reverses
• ridge push and slab pull
• circulating material in the mantle
• Earth's internal heating

Tags

NGSS.MS-ESS2-3

NGSS.MS-PS2-4

What is slab pull?

• cooler, denser crust sinks (is pulled) into the mantle along a trench

• when edges become denser and gravity pulls them downward and away from one another

• currents just beneath Earth's crust flow very slowly, causing movement in the plates above them

• folding and crumpling and sliding upward creating mountains

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3