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Luca Gcse Science > Earth and Atmosphere > Flashcards

Earth and Atmosphere Flashcards

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1
Q

What are the three main layers of Earth?

A

What are the three main layers of Earth? Crust, mantle, core

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2
Q

Which layer of Earth is made of solid rock?

A

Crust

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3
Q

Which layer of Earth flows very slowly?

A

Mantle

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4
Q

Which layer of earth is solid metal?

A

Core

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5
Q

Why can the crust move

A

It has tectonic plates, which are moved by the mantle

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6
Q

What are the three types of rock?

A

What are the three types of rock? Sedimentary, igneous, metamorphic

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7
Q

How do sedimentary rocks form?

A

Smaller bits of other rocks get stuck together

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8
Q

What are the properties of sedimentary rock?

A

Crumbly, they form in layers.

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9
Q

How do igneous rocks form?

A

When molten rock cools and solidifies.

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10
Q

How do metamorphic rocks form?

A

When rocks are heated or compressed in the earths crust.

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11
Q

In what kind of rocks are fossils found?

A

Sedimentary rock

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12
Q

What is porous rock?

A

A rock which absorbs water

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13
Q

What are the two main gases in Earths atmosphere?

A

Oxygen and nitrogen

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14
Q

What approximate% of Earth’s atmosphere is nitrogen?

A

78%

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15
Q

What approximate % of Earth’s atmosphere is oxygen?

A

21%

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16
Q

Name two gases other than oxygen and nitrogen that are in Earth’s atmosphere

A

Carbon dioxide, water vapour

17
Q

How is carbon dioxide removed from the atmosphere?

A

Photosynthesis

18
Q

In what three ways is carbon dioxide added to the atmosphere?

A

Respiration, combustion of fossil fuels, decomposition

19
Q

Why is adding more carbon dioxide to the atmosphere a problem?

A

It causes global warming (which causes climate change)

20
Q

How has the amount of carbon dioxide in the atmosphere changed over the last 200 years?

A

Increased rapidly

21
Q

Why has the amount of carbon dioxide in the atmosphere increased rapidly over the last 200 years?

A

Humans began burning fossil fuels

22
Q

What is the order of earths layers from top to bottom?

A

1-Crust
2-Mantle
3-Core

23
Q

Which plant cell’s do not contain chlorophyl

A

Root hair cells

24
Q

What type of organisms carry out decay?

A

Decomposers

25
Q

Give two examples of decomposers.

A

Bacteria, Fungi

26
Q
A

Luca Gcse Science (2 decks)

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