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Science - Earth and the Atmosphere > Rocks > Flashcards

Rocks Flashcards

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1
Q

What are the 3 different types of rocks?

A

Sedimentary, Igneous and Metamorphic

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2
Q

Sedimentary rocks are made of ___ ___ which makes them _____

A

sperate grains, porous

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3
Q

weathering breaks rocks into ___

A

sediments

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4
Q

True or False

Sedimentary rocks are soft and can be scratched easily

A

True

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5
Q

example of sedimentary rocks

A

sandstone and limestone

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6
Q

What is physical weathering?

A

when large pieces or rock are broken into smaller pieces by water in the cracks freezing (happens because of temperature changes)

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7
Q

What is chemical weathering?

A

when acids in the rain react with substances in the rock. (happens when it rains on a rock)

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8
Q

What is biological weathering?

A

when plants and animal break up rocks

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9
Q

What is the meaning of the general term weathering?

A

breaking up rocks into smaller pieces

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10
Q

what is erosion?

A

breaking up of rock into smaller pieces away from the original rock

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11
Q

what is transport?

A

moving of sediments far away from the original rock

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12
Q

what is deposition?

A

settling of sediments that have moved away from their original rock

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13
Q

what is compaction?

A

squashing the sediments together to make new rocks

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14
Q

what is cementation?

A

when another substance sticks the sediments together

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15
Q

can both compaction and cementation can happen in the same rock?

A

nope :)

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16
Q

when are igneous rocks formed?

A

when liquid rock cools down (this can happen within the Earth’s crust or outside, including underwater)

17
Q

Name a few properties of igneous rocks

A

hard, durable (difficult to damage), not porous, consist of crystals

18
Q

example of metamorphic rock

A

marble and slate

19
Q

what are 2 properties of metamorphic rocks

A

they have crystals and are not porous

20
Q

when are metamorphic rocks formed?

A

when other types of rocks are under high pressure and/or temperatures but do not melt

Science - Earth and the Atmosphere (4 decks)

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