Middle School Earth Science Summary

Mountains form from ...

• plates sliding past one another
• collision of plates
• plates moving away from each other

Associated with transform boundaries.

• Volcanoes
• mountains
• trenches
• earthquakes

The area around the pacific plate where boundaries form is called...

• death ring
• fire zone
• ring of fire
• zone of fire

Which is true about hotter material in the mantle (convection currents)?

• more dense, sinks

• less dense, sinks

• less dense, rises

• more dense, rises

This land formation occurs at a divergent continental/ continental boundary.

• mid ocean ridge
• deep ocean trench
• pacific hot spot
• rift valley

Which ocean is expanding due to a mid-ocean ridge?

• Indian
• Dead Sea
• Atlantic
• Artic

What are the 3 basic layers?

• core, mantle, lithosphere
• asthenosphere, lithosphere, crust
• core, mantle, crust
• crust, mantle, inner core

The outer core is liquid metal while the inner core is solid due to 

• water vapor
• great pressure
• a decrease in pressure
• being solid metal

What do fossils tell us?

• Organisms and environments that once existed
• organisms that are alive today

The oceanic crust _________ when it reaches the continental crust.

• sinks
• rises
• expands