Unit 2 Earth Processes

Tectonic plates are made up of continental crust and ________ crust.

• continental
• oceanic
• plates
• mantle

What type of boundary occurs when two tectonic plates collide?

• divergent
• convergent
• transform

What type of boundary occurs when two tectonic plates separate?

• divergent
• convergent
• transform

What is the main method of heat transfer from core to the crust of Earth

• conduction
• convection
• insulation
• radiation

What was Pangaea? When did it form and when did it break apart?

• a large ocean basin that opened in the Triassic and closed in the Paleocene
• the supercontinent that formed in the late Paleozoic and broke apart in Mesozoic
• the huge mountain range formed when Africa pushed northward into Europe in Eocene time
• a large, Precambrian shield area of Africa and South America that broke apart early in the Proterozoic

On the sea floor; the oldest crust is furthest away from the magma

• true
• false

Oil, natural gas, and coal are considered to be nonrenewable resources. Why are these fuels considered to be nonrenewable?

• The burning of these fuels does not allow the waste products to be recycled
• These fuels are available in a limited supply--when the fuel is used it is no longer available
• The amount of pollution released from the use of these fuels is much higher than with renewable sources.
• The technology used to generate energy by the use of these fuels is much older and less efficient than current technology

Muscovite breaks along a single plane to form flat sheets. This tendency to break along smooth planes parallel to weak zones of bonding is called

• cleavage
• fracture
• hardness
• streak.

Why is copper considered to be a non-renewable resource?

• Copper cannot be recycled
• Copper ore is not replaced once it is mined.
• Copper is present in all rocks and ores on Earth.
• Many substitutes can be used for copper in industr

What is the action force responsible for seafloor spreading?

• the destruction of ocean crust in trenches
• the intrusive of magma forced up toward the ocean ridge
• the force of the ocean crust sitting on the asthenosphere
• the differences in mass of the ocean and continental plates