Basic Rock Types Flashcards Preview

Geography Unit 1 Theme C > Basic Rock Types > Flashcards

Flashcards in Basic Rock Types Deck (15)
Loading flashcards...
1

Name the three basic rock types.

Igneous, sedimentary and metamorphic.

2

Two examples of igneous rocks

Basalt and granite

3

Two examples of sedimentary rocks

Limestone and sandstone

4

Two examples of metamorphic rocks

Slate and marble

5

State briefly what igneous rocks are formed from

Magma underground

6

What is magma above ground called?

Lava

7

Explain the formation of basalt

Magma above ground is called lava, which cools quickly to form tiny crystals called extrusive igneous rock.

8

What is magma?

Melted rock

9

Explain the formation of granite.

Magma underground cools slowly to form large crystals called intrusive igneous rock.

10

What is limestone formed from?

Dead sea creatures

11

What is sandstone formed from?

Sand particles

12

Explain the formation of sedimentary rocks.

1. Small particles of rock or dead sea creatures are deposited on the sea floor as sediment.
2. The sediment builds up in layers.
3. The layers are compressed and compacted under their own weight, turning into rock.

13

Explain how metamorphic rocks are formed.

They are formed from other igneous and sedimentary rocks which are changed by heat or pressure.

14

Limestone under pressure changes to what?

Marble

15

When heated, mudstone changes to what?

Slate