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Chemistry Earth Flashcards

1
Q

What state is the mantle

A

Solid

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2
Q

What is the core made of

A

Molten iron and nickel

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3
Q

What state is the outer core

A

Liquid

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4
Q

What state is the inner core

A

Solid

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5
Q

True or false, the inner core is more dense than the crust

A

True

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6
Q

What is the earths crust split up into

A

Different sections called tectonic plates

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7
Q

How much are the tectonic plates moving every year

A

A few centimetres

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8
Q

What causes the tech tonic plates to move

A

Convection currents

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9
Q

What evidence did Alfred wegener have That Africa and South America were once together

A

The rocks were the same
The fossils were the same
They fit together

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10
Q

How thick is the crust

A

10-100km

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11
Q

Did people believe wegener and why

A

No, he couldn’t explain how conte rental drift happened

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12
Q

What did wegener call his theory

A

Tectonic theory

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13
Q

What are the 2 things that effect co2

A

When fossil duels are burnt they release a co2

The sea absorbed the co2 in the air

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14
Q

What is a metal ore

A

A metal ore is a mineral or a mixture of minerals

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15
Q

What do most ores contain

A

Metal oxides

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16
Q

What is phytomining

A

Phytomining uses plants to exstract copper from the ground

17
Q

What is Bioleaching

A

Bioleaching uses bacteria to exstract copper from solutions

18
Q

What are the pros of recycling metals

A

Saves natural resources
Less waste to landfill
Less fossil fuels are burnt
Less mining so less habitats are destroyed

19
Q

What are the cons of recycling metals

A

Transport uses fossil fuels so co2 produced

20
Q

Where on the periodic table are transition metals

A

In the middle block

21
Q

What are transition metals uses

A

They are strong
Relatively unreactive
Good conductors
High melting points

22
Q

Name one transition metal

A

Copper

23
Q

What is an element

A

An element is made up of one type of Atom

24
Q

What is a compound

A

These are 2 or more elements chemically bonded together

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