plate tectonics and earth layers

This layer of Earth is the thickest part

• crust
• outer core
• mantle
• inner core

What was the name given to all the continents when they were joined as one super continent? 

• Supreme Continent
• Eurasia
• Plate tectonics
• Pangea

Which of these layers is ALL solid iron and nickle?

• inner core
• outer core
• lithosphere
• mesosphere

The layer that makes up most of the earth's mass and volume is the

• crust
• mantle
• core
• asthenosphere

Which of the following occurs because of convection currents?

• Tectonic plates on the crust move.
• The mantle increases in size.
• Pressure in the crust increases.
• Pressure in the crust decreases.

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

• Continental crust
• Oceanic crust
• Asthenosphere
• Lithosphere

As you travel from the inner core to the crust, how would temperature, pressure and density of the material change?

• The would all increase
• The would all decrease.
• They would stay the same.  
• Temperature would decrease, but pressure and density would increase. 

The physical layer of Earth made of solid rock and soil is called the ___________. 

• mesosphere
• lithosphere
• asthenosphere
• mantle

Where does the heat come from that drives this convection current in the mantle? 

• The sun
• The crust
• the mantle
• the core

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