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Geography > Rocks > Flashcards

Rocks Flashcards

1
Q

Like water, rocks are part of what?

A

A cycle.

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2
Q

What are the types of rock?

A
  1. Igneous rock 2. Sedimentary Rock 3. Metamorphic rock
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3
Q

Different rocks give what that is valuable to us?

A

Different minerals

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4
Q

All rocks start out as what?

A

Molten rock beneath the earth’s surface.

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5
Q

Cooled molten rock is what?

A

Igneous rock

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6
Q

All rocks come from what type?

A

Igneous rock

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7
Q

Give an example of igneous rock.

A

Pumice

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8
Q

What is igneous formed beneath earth’s crust?

A

Intrusive Igneous rock.

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9
Q

What is igneous rock that is formed above earth’s crust?

A

Extrusive igneous rock.

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10
Q

What is intrusive igneous rock like?

A

Large crystals, course texture.

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11
Q

Why is intrusive igneous rock coarse?

A

Crystals have a long time to form as the magma cools slowly.

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12
Q

What is extrusive igneous rock like?

A

Small crystals, fine texture.

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13
Q

Why does extrusive igneous rock have a fine texture?

A

It cools quickly, crystals do not have time to grow.

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14
Q

Give and example of extrusive igneous rock.

A

Basalt.

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15
Q

What metallic minerals does igneous rock contain?

A

Nickel, copper, gold and silver.

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16
Q

How is sedimentary rock formed?

A

Pre-existing rock is eroded which creates sediments that settle in horizontal layers. The weight of the layers and water above compress the sediment into rock.

17
Q

Give and example of sedimentary rock.

A

Sandstone

18
Q

What resources can be found in sedimentary rock?

A

Coal, oil, natural gas, salt, potash.

19
Q

How are oil and gas formed?

A

The bodies of sea animals decomposed and were compressed between rock layers.

20
Q

How is metamorphic rock created? What is the process called?

A

Other rock is subjected to heat, pressure, and certain fluids. It is called metamorphism.

21
Q

Where do minerals occur?

A

Within rocks.

22
Q

What are minerals?

A

Inorganic pure substances found naturally.

23
Q

Are minerals stable or unstable?

A

Stable.

24
Q

What does it take for a rock to be a rock?

A

It must contain 2 or more minerals.

25
Q

Feeling confident?

A

You can do it! :D

26
Q

Draw the rock cycle

A

Geography (6 decks)

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