Continetal Drift Practice #2

Front

What is continental drift?

Back

The theory that continents have moved over geological time and were once joined together in a single landmass.

Front

What evidence supports the theory of seafloor spreading?

Back

Magnetic striping on the seafloor on either side of mid-ocean ridges.

Front

What is the outer core made of?

Back

Liquid iron-rich material.

Front

Why did scientists initially reject Wegener's theory of continental drift?

Back

He could not explain how the continents move.

Front

What type of evidence is matching fossils?

Back

Fossils found on different continents that are the same, indicating they were once connected.

Front

What is matching land formation evidence?

Back

Similar geological structures found on different continents, suggesting they were once part of the same landmass.

Front

What is the significance of tropical plant fossils found in Antarctica?

Back

They suggest that Antarctica was once located in a warmer climate.

Front

What is the theory of plate tectonics?

Back

The theory that the Earth's outer shell is divided into several plates that glide over the mantle.

Front

What role do convection currents play in continental drift?

Back

They drive the movement of tectonic plates in the mantle.

Front

What is the mid-ocean ridge?

Back

An underwater mountain range formed by seafloor spreading.