Geological Processes Flashcards

1
Q

What can’t geologists know for sure?

A

How the surface of the Earth has changed.

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2
Q

What can they base their suggestions on?

A

From evidence from the processes that can be seen today.

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3
Q

What are examples of these processes?

A
Mountain building
Erosion
Sedimentation
Dissolving
Evaporation
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4
Q

What are magnetic clues used for?

A

Geologists can use magnetic clues in rocks to track the very slow movement of the continents over the surface of the Earth.

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5
Q

Where were rocks that now make up Britain formed?

A

In different climates.

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6
Q

What clues do Sedimentary rocks often contain clue that suggest how they were formed?

A

Fossils and the presence of shell fragments
Ripple patterns on sediments that settled on the bottom of the sea of a river
The shape of water-borne grains compared with air-blown grains.

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7
Q

Are the tectonic plates that make up the Earth moving?

A

Yes, but very slowly

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8
Q

What are they dragged by?

A

The convection currents in the mantle beneath them.

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9
Q

What is this theory supported by?

A

The continents that we see today seem as though they might have once fitted together
Similar rocks have been found on opposite sides of the Atlantic Ocean

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