Unit 2.2

Front

What is the force that moves the continents?

Back

Convection is the process that moves the continents through the movement of molten rock in the Earth's mantle.

Front

When were the continents last all together?

Back

The continents were last all together around 250 million years ago.

Front

What are homologous structures?

Back

Homologous structures are anatomical features in different species that share a common ancestry, even if they have different functions.

Front

What was the name of the supercontinent?

Back

The supercontinent was called Pangea.

Front

What was Wegener's hypothesis about continental drift?

Back

Wegener's hypothesis stated that all continents were joined in a single landmass and have drifted apart over time.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids and gases), which causes the movement of tectonic plates.

Front

What is the significance of Pangea in geology?

Back

Pangea is significant because it represents a time when all continents were connected, helping to explain the distribution of fossils and geological features.

Front

What are analogous structures?

Back

Analogous structures are features in different species that serve similar functions but do not share a common ancestry.

Front

What is the theory of plate tectonics?

Back

The theory of plate tectonics explains how the Earth's lithosphere is divided into tectonic plates that move and interact, causing geological phenomena.

Front

What evidence supports the theory of continental drift?

Back

Evidence includes the fit of continental coastlines, fossil distribution, and geological similarities across continents.