8th Grade Benchmark Review

What is the outer layer of the earth called?

• Inner core
• Outer core
• Crust
• Mantle

Earth's crust is broken up into several large rocky pieces called ...

• plates
• faults
• fossils
• puzzle pieces

What causes tectonic plates to move along the Earth's surface?

• wind
• ocean currents
• convection in the mantle
• expansion of the Earth

What type of boundary occurs when two plates move away from each other?

• transform
• subduction
• convergent
• divergent

What forms at a divergent boundary between two oceanic plates?

• rift valley
• mountain
• mid-ocean ridge
• trench

What type of boundary occurs when two plates move toward each other?

• convergent
• divergent
• transform
• lateral

What forms at a convergent boundary between a continental plate and an oceanic plate?

• volcanoes
• rift valleys
• faults
• mid-ocean ridges

A supercontinent containing all of Earth's land that existed about 225 million years ago.

• Pangea

• Gondwanaland

• Rodinia

• Pannotia

The theory that the continents have not always been in their present locations but have moved there over millions of years

• Continental Drift Theory

• Plate Tectonics

• Alfred Wegener

• Lystrasaurus

the region where an oceanic plate sinks down into the asthenosphere at a convergent boundary, usually between continental and oceanic plates

• deep ocean trench

• rift valley

• oceanic ridge

• subduction zone