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Flashcards in Rocks Quizzes Deck (16):
1

Three types of rocks

Sedimentary
Metamorphic
Igneous

2

How are sedimentary rocks formed

Layers of sediments lay down in water bodies

Over millions of years, the layers get buried under more layers

The layer weight squeezes out the water

Fluids (natural minerals) flowing through pores cement the layers

3

Give examples of sedimentary rocks

Limestone
Chalk

4

Explain erosion

The removal or transportation of broken up rocks

Sedimentary rocks are more susceptible to this

5

How are metamorphic rocks formed

By the action of heat and pressure on sedimentary rocks over periods of time

Have interlocking crystals

6

What physically changes in the sedimentary or igneous rock to make it metamorphic

Mineral structure
Texture
Not the chemical composition

7

How are igneous rocks formed

Magma/lava cools down and solidifies

They contain crystals that interlock

8

Define magma

Molten rocks deep in the earth

9

Define lava

Molten rock that erupts to the surface

10

What do the size of igneous rocks depend on

The rate at which they cool

The faster, the smaller (extrusive)

11

Example of an igneous rock, GO

Granite
Basalt
Rhyolite
Gabbro

12

Properties of marble

Limestone reformed as small crystals so
Harder and more texture

13

Uses of limestone

Building blocks
Statues
Road surfacing
In cement, for concrete
Glass= sand+ sodium carbonate +
Neutralising acidic soil
Neutralising chimney Sulfur dioxide

14

Advantages of limestone

Provides useful products
Houses
Roads

Neutralises, reduces acid rain

An income, jobs , improves local economy

15

Disadvantages of limestone

Quarrying is
Noisy
Ugly
Dusty
Destroys habitat
Requires pollutive transportation
Waste materials produce tip

16

What does limestone thermally decompose to

Calcium oxide and carbon dioxide