Earth and atmosphere: types of rock

Question 1

How is igneous rock formed?

Answer 1

Igneous rock is formed from solidified molten rock.

Question 2

How is metamorphic rock formed?

Answer 2

Metamorphic rock is formed from either sedimentary rock or igneous rock which has changed due to heat, pressure or both.

Question 3

How is sedimentary rock formed?

Answer 3

Sedimentary rock is formed from layers of broken bits of other rock which join together to become one.

Question 4

What is the structure of igneous rock?

Answer 4

Igneous rock consists of randomly arranged crystals interlocking.

Question 5

What is the structure of sedimentary rock?

Answer 5

Sedimentary rock has layers of rock pushed together to form one. it normally appears jagged in nature.

Question 6

What is the structure of metamorphic rock?

Answer 6

Metamorphic rock are formed from igneous rock or sedimentary rock which has been put under immense pressure or heat hence changing the look of the original rock.

Question 7

Give 1 example of igneous rock.

Answer 7

Pumice, granite or obsidian.

Question 8

Give 1 example of sedimentary rock.

Answer 8

Chalk, limestone, shale or sandstone.

Question 9

Give 1 example of metamorphic rock.

Answer 9

Marble, schist or gneiss.