Quiz one tectonic

What type of plate boundary occurs between the African plate and the Eurasian plate?

• transform

• convergent

• divergent

What factors drive convection currents?  Select all that apply.

• density

• temperture

• compositon

• color

The deepest layers in Earth are _____.

• less dense and colder

• more dense and hotter

• more dense and colder

• less dense and hotter

Which of the following is evidence of Continental Drift?  Select any that apply.

• The continents fit together like pieces in a puzzle.

• Old maps of the Earth by early explorers.

• Ancient climate deposits like coal and coral reefs in Illinois.

• Identical fossils of plants and animals found on multiple continents.

The theory that proposed Pangaea was separated into smaller continents was _______.

• seafloor spreading

• plate tectonics

• subduction

• continental drift

What would you expect to happen at a continental-continental convergent plate boundary?

• Both plates would move upward because they have the same density.

• Both plates would subduct because they have the same density.

• The less dense plate would subduct.

• The more dense plate would subduct.

Some seismic waves do not travel to the opposite side of Earth because _______.

• the waves are absorbed by the outer core

• the Earth is too thick for waves to pass through

• the crust is too dense for waves to travel through

• the core is too hot for waves to pass through

An oceanic plate subducts under a continental plate, melts, and creates magma. If the magma rises to the surface it creates a _______.

• volcano

• fault

• mid-ocean ridge

• trench

Explain why the process that creates the boundary at B in the illustration occurs.

• Molten material rises through the crust and solidifies, pushing older crust away

• Gravity pulls the plates apart

• As Earth rotates on its axis the plates are forced apart 

• The plates are pushing against each other until one is pushed backwards

When we discuss lithosphere, asthenosphere, and mesophere, we are classifying layers 

• chemically

• mechanically