Glencoe Blue chapter 7

What do scientists believe is the force behind the plate tectonics theory?

• the Sun's gravity

• gravity slab pull

• convection currents

• the movement of the planets

What is the lithosphere?

• the plates that make up the crust and the upper part of the mantle

• the plates that make up the crust

• the upper part of the mantle

• large, flat stones sitting on top of malleable magma

What happens when an oceanic plate converges with a continental plate?

• The denser oceanic plate slides under the less dense continental plate.

• The less dense oceanic plate slides under the denser continental plate.

• The less dense oceanic plate slides past the denser continental plate.

• The denser oceanic plate slides on top of the less dense continental plate.

What clue supported the continental drift theory?

• a puzzle-like fit of all the continents

• Similar rock structures have been found on different continents.

• Fossils of animals have been found on continents separated by oceans.

• all answers are correct

How can crust disappear at the edge of a boundary?

• because new crust is being added to the other edge of the boundary

• The other edge of the boundary is being pulled into Earth's core.

• It is too dense and is sinking into Earth.

• Gravity is pulling it down.

What does plate tectonics cause?

• forms mountains

• forms ocean basins

• causes volcanoes

• all answers are correct

What kind of movement created the Himalaya Mountains?

• divergent boundaries

• compressional forces

• reversals of Earth's magnetic field

• erosion

What is the plate tectonic theory?

• the belief that Earth is broken into sections that fit together into one sphere

• the belief that Earth's crust and upper mantle is broken into sections

• the belief that continents have moved slowly apart to their current locations on Earth

• the belief that hot, less dense material is forced up through Earth's crust through mid-ocean ridges

What is a transform boundary?

• A transform boundary is when two plates pull away from each other.

• A transform boundary is when two plates slide past one another.

• A transform boundary is when two plates move toward each other.

• A transform boundary is when two plates collide.

What is Pangaea?

• the large landmass in which all continents once were connected

• the large landmass that all continents are currently forming

• Earth's inner core

• the largest fault found on Earth