TEST Q2_2 (Mod F) 24_25 #1

Front

What is Pangaea?

Back

The supercontinent that existed millions of years ago.

Front

What type of boundary forms a rift valley?

Back

Divergent.

Front

What evidence supports the theory of plate tectonics regarding ocean crust?

Back

New ocean crust is formed when different underwater boundaries push away older crust.

Front

Why are fossils of Glossopteris significant in understanding continental connections?

Back

Fossils of the fern Glossopteris seeds were too heavy to be carried across the ocean by wind.

Front

What does the age of ocean crust indicate about its formation?

Back

Rocks farther away from the center of mid-ocean ridges are older than those near it.

Front

What is the significance of Cynognathus and Lystrosaurus in the context of continental drift?

Back

They were land reptiles unable to swim across the ocean, supporting the idea that continents were once connected.

Front

What is a divergent boundary?

Back

A tectonic boundary where two plates move away from each other, often creating rift valleys.

Front

How do scientists determine the age of ocean crust?

Back

By determining the age and magnetic record of rock samples taken from the sea floor.

Front

What is the role of sonar in studying ocean crust?

Back

Sonar is used to map rocks on the sea floor.

Front

What is the relationship between ocean crust and continental crust?

Back

Ocean crust is generally younger than continental crust.