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Year 7 and 8 Science End of Year Exams > Rocks & Pressure > Flashcards

Rocks & Pressure Flashcards

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1
Q

What are rocks made out of?

A

Grains

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2
Q

Rocks can be different what and shapes?

A

Sizes

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3
Q

Grains give rocks what?

A

Texture

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4
Q

As magma traps in small pockets it…

A

Cool and magma becomes an igneous rock

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5
Q

How are igneous rocks formed?

A

When volcanoes erupt causing the magma to rise above the earths surface and are formed from the lava cooling above the ground

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6
Q

If the rock has small crystals it cools down..

A

Quickly

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7
Q

If the rock has large crystals its cooled down ..

A

Slowly

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8
Q

Force = ? x Area

A

Pressure

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9
Q

Pressure = area divided by ?

A

Force

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10
Q

Area = what divided by pressure?

A

force

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11
Q

Sedmentary rocks are what?

A

Porous

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12
Q

Sedimentary rocks are harder or softer than igenous rocks?

A

Softer

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13
Q

All rocks are made up of different what?

A

Minerals

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14
Q

How are metamorphic rocks formed?

A

when other rocks are deeply squashed or heated under great pressure

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15
Q

All of what type of rocks were originally other types of rock

A

Metamorphic

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16
Q

As more layers of rocks build up, the older rocks get pushed were into the earth?

A

Down

17
Q

Earth what can squeeze the rocks?

A

Movements

18
Q

Earth movements can squeeze the rocks and raise their what?

A

Temperature

19
Q

Over a long period of time the rocks can get changed into what type of rock?

A

Sedimentary

20
Q

Limestone changes into what rock when its heated and squashed

A

Marble

21
Q

Is Marble a metamorphic rock?

A

Yes

22
Q

Temperature cause what type of weathering?

A

Physical

23
Q

The rock what during the day when its hot in physical weathering

A

Expands

24
Q

What does the rock do when its cold at night in physical weathering

A

Contract

25
Q

What action can cause physical weathering

A

Freez-Thaw

26
Q

Rain can cause what type of weathering

A

Chemical

27
Q

The what in the rain dissolves parts of rock?

A

Acid

28
Q

Acid rain can be caused by burning what

A

Fossil Fuels

29
Q

Plant roots can acuse what type of weathering

A

Biological

30
Q

The plant roots grow into small what in the rocks

A

Cracks

Year 7 and 8 Science End of Year Exams (23 decks)

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