Earth Science Quiz #2

What type of plate boundary is found at point A?

In general, when two plates collide, the one that is more dense will subduct under the other.

_________________ decides which plate will be subducted at a convergent boundary.

What type of plate boundary is found at point C?

When oceanic crusts collides with continental crust, the oceanic crust is subducted underneath.

______________ is an idea that continents were once joined but have slowly separated over time.

At which point is subduction occurring?

Mountains are formed when two plates carrying oceanic crust converge.

Molten material viewed by submarines shows the creation of new crust at mid-ocean ridges.

Fossil evidence shows the same land species on continents that are now separated by oceans.

There are signs of climate change, such as glacier markings on rocks in now warmer climates.

Scientists rejected Wegener’s theory because he could not…

All continents were once joined together in a supercontinent known as _________________.

Who first proposed the theory of continental drift?

____________ are caused by Earthquakes & provide evidence to the structure of Earth’s interior.

The ________________ is a layer of semi-solid material found below the lithosphere.

Older rocks are found close to mid-ocean ridges, while newer rocks are found near trenches.

In a convection current, the cooler, denser material will…

_________________ is a theory that pieces of Earth’s lithosphere are in slow, constant motion

At which point is there a mid-ocean ridge?

Changes in the heat and density of rock create ____________________ in the mantle of the Earth.

Drilling samples of rock show that age increases as distance from a mid-ocean ridge increases.

Name this plate boundary.

The __________________ is the outer “skin” of the Earth.

__________________ are formed at convergent boundaries between two continental plates.

The _________________ is a rigid layer that includes the upper part of the mantle & the crust.

At which point is there a trench?

The ____________________ is a dense, solid ball of iron and nickel.

Magnetic stripes on each side of a mid-ocean ridge show the reversals of Earth’s magnetic field

The __________________ is a layer of liquid iron and nickel.

Rock formations on different continents match each other in rock age and type.

Which point demonstrates the overall process of sea-floor spreading?

Which part of Earth’s interior is thought to drive plate tectonics?

Which part of Earth’s interior is thought to be responsible for the planet’s magnetic field?

Name this plate boundary.

Subduction is…

Name this plate boundary.