PHY SCI: 9.3 Plate Tectonics

Forms where plates are moving away from each other

• Divergent-

• Convergent-

• Transform-

Formed where two sections of Earth’s crust are colliding

• Divergent-

• Convergent-

• Transform-

The land mass where all of the continents were once together in one large continent is called ________________.

• Laurasia.

• Pangaea.

• Eurasia.

• Gondwana.

Tectonic plates consist of

• continental crust.

• mesosphere.

• both continental and oceanic crust.

• oceanic crust.

The movement of the tectonic plates is caused by

• the rotation of the Earth.

• convection currents in the Asthenosphere

• the gravity of the iron-nickel core.

• the Moho discontinuity.

Most geologists think that the movement of Earth’s plates is caused by _______

• convection.

• continental drift.

• subduction.

• conduction.

What are the two types of crust

• continental and oceanic
• ocean and upper
• lower and upper
• pizza and subway

What is this a picture of?

• plate tectonics
• continental drift
• pangea
• glacier scaring

What does the theory of continental drift state?

• The continents were once joined in a super-continent and have moved over time
• Continents are stationary and do not move
• The Earth is broken into lithospheric plates that move due to convection currents
• none of the above

How fast the continents move?

• 3-4 inches per day

• 3-4 inches per week

• 3-4 inches per month

• 3-4 inches per year