Earths plate boundaries

Front

Which conclusion is best supported by the discovery of the same fossils on separate continents?

Back

Modern land masses were once connected but moved apart.

Front

What evidence did Alfred Wegener use to support the idea that Earth's continental landmasses had drifted apart over time?

Back

the shape of the continents

Front

How would the nature of plate motion limit the possible changes to sea level?

Back

by causing changes to occur at very slow rates

Front

How does the diagram of a cross section of Earth confirm Alfred Wegener’s hypothesis of continental drift?

Back

It illustrates how crustal plates float on convection currents in Earth’s mantle.

Front

What is the most likely explanation for finding 200-million-year-old Mesosaurus fossils on both South America and Africa?

Back

The continents were once attached to each other and then drifted apart.

Front

The breakup of Pangea had which effect on the subsequent history of animal speciation?

Back

Separated animal populations evolved independently.

Front

Two tectonic plates are each moving at a rate of 10 millimeters per year in opposite directions away from a mid-ocean ridge. How long will it take for the ridge to become 100 millimeters broader?

Back

5 years

Front

Ecological changes in Antarctica after moving southward post-Pangea breakup?

Back

organism adaptations to colder and more arid climates

Front

Which model best shows how heat from inside of Earth reaches the surface of Earth?

Back

Front

What discovery confirmed that the continents move on plates?

Back

spreading of the sea floor