Yr 7 Science Test Geology Flashcards Preview

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Flashcards in Yr 7 Science Test Geology Deck (16)
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1

Igneous rock turns into metamorphic through

Heat and pressure

2

Metamorphic rock turns into sedimentary through

Weathering and erosion

3

Sedimentary turns into igneous through

Remelting

4

Igneous turns into sedimentary through

Weathering and erosion

5

Sedimentary turns into metamorphic through

Heat and pressure

6

Metamorphic turns into igneous through

Remelting

7

The formation of igneous rocks

Igneous rock is formed through the cooling of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.

8

extrusive and intrusive igneous rocks

An extrusive rock is a rock that is formed above the Earth's surface through volcanoes, thus also being called volcanic rocks. An intrusive rock is a rock that is formed below the Earth surface by magma cooling underground. As a result intrusive rocks can be coarse grained. They are also called plutonic rocks.

9

how cooling rate affects crystal size

If a molten rock cool rapidly, the crystals are smaller. If it cools slowly the crystals are larger.

10

formation of sedimentary rocks

Sedimentary rocks are formed when sediment is deposited out of air,wind or water.This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.

11

the role of water in the formation of many sedimentary rocks

The water in fast moving rivers can carry weathered rock and erodes the rocks. These sediments are laid down then gradually form into sedimentary rock.

12

the roles of heat and pressure in the formation of metamorphic rocks

Igneous and sedimentary are subjected to increased heat and pressure below the Earth's surface. The Temperature increases by 25 degrees Celsius every kilometre below the surface. This heat and pressure causes metamorphism.

13

the cyclic nature of the formation of igneous, sedimentary and metamorphic rocks

Aa

14

the uses of igneous, sedimentary and metamorphic rocks, including as building materials.

A

15

how layers of sedimentary and other rocks, together with fossils, reveal information about past
environments and life on Earth

A

16

recall that all rocks are made of substances called minerals
- describe the physical properties of a variety of minerals

K