Topic 2- Materials From The Earth

Question 1

What determines how large crystals in a rock will be?

Answer 1

How long the rock took to cool, longer cool, larger crystals, shorter cool smaller crystals

Question 2

Give an example of sedimentary rock

Answer 2

Chalk

Limestone

Question 3

Give an example of metamorphic

Answer 3

Marble

Question 4

Give an example of igneous rocks

Answer 4

Granite

Question 5

How are sedimentary rocks formed?

Answer 5

They are formed by the compaction of layers of sediment over a long period of time

Question 6

How are igneous rocks formed?

Answer 6

They are formed by the solidification of magma and lava, made of crystals whose depends on rate of cooling

Question 7

How are metamorphic rocks formed?

Answer 7

Sedimentary rocks are changed by the action of heat and pressure to make metamorphic rocks

Question 8

What are the disadvantages of limestone quarries?

Answer 8

Destroys landscapes
Lots of noise
Increased levels of traffic

Question 9

What are the advantages of limestone quarries?

Answer 9

Creates jobs

Makes lots of money for economy

Question 10

What is the word equation for thermal decomposition of calcium carbonate?

Answer 10

Heat

Calcium carbonate –> calcium oxide + carbon dioxide

Question 11

What is the product when water meets calcium oxide

Answer 11

It forms calcium hydroxide, (slaked lime)

Question 12

Why do we recycle materials?

Answer 12

Preventing waste of materials

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