Rocks

Question 0

Name two igneous rocks

Answer 0

Granite, basalt

Question 1

Name three types of rock

Answer 1

Igneous, sedimentary, metamorphic.

Question 2

How is granite formed?

Answer 2

Granite is made when magma forces it’s way into the crust. It cools very slowly over millions of years to form large crystals. The rock comes to the surface when all the rocks above are worn away.

Question 3

What colour can granite be?

Answer 3

It can be black to greyish colours as well as pink

Question 4

What is granite used for?

Answer 4

Monuments, countertops

Question 5

What type of rock is quartzite?

Answer 5

Metamorphic

Question 6

Name two metamorphic rocks.

Answer 6

Quartzite and marble

Question 7

How is marble formed?

Answer 7

When molten magma forces it’s way into limestone it becomes under great heat and pressure. This changes the make up of the rock and changes it to marble

Question 8

What colour is marble? (Pure)

Answer 8

White

Question 9

What is marble used for?

Answer 9

Fireplaces ornaments gravestones

Question 10

How is basalt made?

Answer 10

Basalt is formed when lava spreads out across the earths surface and cools very quickly because it is exposed to the air. It can result in tiny crystals forming in the rock that can’t be seen by the naked eye.

Question 11

What colour is basalt?

Answer 11

Basalt varies in colour from black to light grey.

Question 12

Name two sedimentary rocks.

Answer 12

Limestone, sandstone

Question 13

How Is limestone formed?

Answer 13

Limestone is formed on the beds of shallow warm seas from the remains and skeletons of tiny sea creatures, fish and shells. The different particles are cemented together after they pile up over millions of years

Question 14

What colour is limestone

Answer 14

Limestone varies in colour from white to dark grey

Question 15

What is limestone used for?

Answer 15

It’s the raw material for cement

Monuments

Question 16

Is limestone permeable? True/false

Answer 16

True

Question 17

How is sandstone formed.

Answer 17

Sandstone is formed when sand is deposited on the beds of lakes or seas as well as deserts. The sand builds up over time and is then compressed and cemented together

Question 18

What colour is sandstone

Answer 18

Brown/red colour

Question 19

How are igneous rocks formed

Answer 19

Igneous rocks are formed due to volcanic activity. They are formed when lava or magma cools and solidifies either on land or in the crust

Question 20

How are metamorphic rocks formed

Answer 20

Metamorphic rocks are when other rocks change in some shape or form by great heat and pressure. These rocks are either igneous or sedimentary before they change.

Question 21

How are sedimentary rocks formed

Answer 21

Sedimentary rocks are formed from the remains of small animals, plants or other rocks. They are made when lots of different pieces fit together and pile up over millions of years on the beds of seas lakes or on land. These particles are then compressed and cemented together.

Question 22

How is quartzite formed

Answer 22

Quartzite is formed when magma comes into contact with sandstone deep in the earth’s crust.

Question 23

What colour is quartzite

Answer 23

Grey/white

Question 24

What can rocks be used for today in our economy

Answer 24

Ground up rock can be used in agriculture as part of fertiliser
Construction requires blocks and cement which is made of rocks, limestone
Making of headstones and ornaments