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Science > Rocks > Flashcards

Rocks Flashcards

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1
Q

What kind of grains does the rock granite have?

A

Interlocking grains

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2
Q

What kind of grains does the rock sandstone have?

A

Rounded grains

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3
Q

Which grain is most likely to absorb water?

- interlocking grains or rounded grains?

A

Rounded grains

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4
Q

What are porous rocks?

A

Rocks that absorb water

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5
Q

What kind of rock is softer?

Porous or non- porous

A

Porous

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6
Q

What are the three main types of rock?

A

Sedimentary, igneous and metamorphic

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7
Q

What is the formation of sedimentary rocks?

A

Sedimentation -> compaction -> cementation

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8
Q

Examples of sedimentary rock

A

Chalk
Limestone
Sandstone

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9
Q

Formation of igneous rocks

A

Molten (liquid) rock forms when rock melts. When the magma cools and solidifies, the rock igneous is formed

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10
Q

What kind of grains do igneous rocks have?

A

Interlocking grains

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11
Q

What happens to the crystals the slower the magma cools?

A

They are bigger

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12
Q

Examples of igneous rocks

A

Obsidian and basalt

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13
Q

Do igneous rocks contain any fossils?

A

No

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14
Q

Formation of metamorphic rocks

A

The rocks are heated and put under great pressure. They do not melt, but the minerals they contain are changed chemically forming metamorphic rocks.

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15
Q

True or False

Metamorphic rocks are made from melting rock

A

False

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16
Q

Examples of metamorphic rocks

A

Slate

Marble

17
Q

What is slate formed from?

A

Shale

18
Q

What is marble made from?

A

Limestone

19
Q

Do metaphoric rocks contain fossils?

A

Only sometimes if they were formed from a sedimentary rock

20
Q

What types of rock can metamorphic rocks be formed from?

A

Sedimentary and igneous

21
Q

Example of physical weathering

A

Freezing and thawing

22
Q

Example of biological weathering

A

People can cause biological weathering just by walking

23
Q

Example of chemical weathering

A

Acid rain

24
Q

What is acid rain?

A

When fossil fuels such as coal, oil and natural gases are burned, carbon dioxide and sulphur dioxide escape into the air. This dissolves in the water in the clouds and make the rainwater more acidic.

25
Q

What is weathering?

A

The wearing away of rocks

26
Q

What is erosion?

A

The movement of the broken pieces away from site of weathering

27
Q

What are rocks?

A

Rocks are made of grains that fit together

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