Geology Flashcard

Geology Flashcard

Assessment

Flashcard

Science

12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is Wegener’s hypothesis of continental drift?

Back

The hypothesis that the continents once formed a single land mass, broke up, and drifted to their present locations.

2.

FLASHCARD QUESTION

Front

Why was Wegener’s hypothesis of continental drift originally rejected by geologists?

Back

Wegener could not explain how the continents could move through the ocean floor.

3.

FLASHCARD QUESTION

Front

What are convection currents?

Back

Movements in the mantle that occur in circular motions due to heat from the Earth's interior.

4.

FLASHCARD QUESTION

Front

What drives mantle convection?

Back

The heat that drives mantle convection comes from the cooling of Earth’s interior and the decay of radioactive isotopes.

5.

FLASHCARD QUESTION

Front

What causes magma to rise towards the surface in a volcano?

Back

Magma is less dense than the surrounding rock, causing it to rise.

6.

FLASHCARD QUESTION

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.

7.

FLASHCARD QUESTION

Front

What is seafloor spreading?

Back

The process by which new oceanic crust is formed at mid-ocean ridges and older crust moves away.

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