Study Guide for Retake Flashcard - Earth's Movement - Unit 2

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What causes convection currents in the Earth's mantle?

Back

Convection currents in the Earth's mantle are caused by the heat from the Earth's core, which creates a cycle of rising hot material and sinking cooler material.

Front

How does convection relate to plate tectonics?

Back

Convection in the mantle drives the movement of tectonic plates, leading to geological phenomena such as earthquakes, volcanic activity, and the formation of mountain ranges.

Front

What is the role of the Pacific Ring of Fire in geology?

Back

The Pacific Ring of Fire is a region where a large number of earthquakes and volcanic eruptions occur due to tectonic plate boundaries and subduction zones.

Front

What is a divergent plate boundary?

Back

A divergent plate boundary is where two tectonic plates move away from each other, often resulting in the formation of new crust, such as mid-ocean ridges.

Front

What is a subduction zone?

Back

A subduction zone is an area where one tectonic plate is being forced under another, often leading to volcanic activity and the formation of mountain ranges.

Front

What evidence did Wegener provide for Continental Drift?

Back

Wegener provided evidence such as the fit of continental coastlines, fossil similarities across continents, and geological similarities, but he could not explain the mechanism of movement.

Front

What is the significance of heat sources in convection currents?

Back

Heat sources, such as the Earth's core or magma, create temperature differences that drive convection currents, influencing geological processes.

Front

How do convection currents affect the Earth's surface?

Back

Convection currents can lead to the movement of tectonic plates, resulting in earthquakes, volcanic eruptions, and the creation of new landforms.

Front

What is the relationship between temperature and density in convection?

Back

In convection, warmer fluids are less dense and rise, while cooler fluids are denser and sink, creating a cycle of movement.