8H-Rocks

Question 1

Rocks are shaped by

Answer 1

Weathering and erosion

Volcanoes erupting and earthquakes

Question 2

Rocks are classified according to their …… and into what group

Answer 2

Texture

Sedimentary igneous metamorphic

Question 3

Rocks are made up of

Answer 3

Grains

Question 4

Grains are made up of

Answer 4

Mineral

One grain = one mineral

Question 5

How are rocks broken up

Answer 5

Physical weathering
Chemical weathering
Biological weathering

Question 6

How is sedimentary rocks formed

Answer 6

When rock is weathered pieces may fall from the rock and be washed a way from water . This is called erosion . These fragments of rock can be transported by moving wind water or ice . When the water of wind slows down or the ice melts , the fragments are deposited as layers of sediment . As more layers build up the pressure increases forcing the grains closer together and squeeezes water out . This is compaction . These grains have gaps , and minerals can form crystals which act as a glue and cements the sediment together . Compaction and cementation together change sedimentary rocks

Question 7

layers of the earth

Answer 7

Outside to inside

Crust, mantle , outer core (liquid) inner core (solid)

Question 8

Why does the mantle move

Answer 8

The outer core is very hot and evaporates forming a gas which particles push the mantle around

Question 9

Difference between magma and lava

Answer 9

Magma is molten rock inside the earth lava is magma that reaches the earths surface

Question 10

How is internal igneous rock formed

Answer 10

Magma which is trapped underground cools slowly forming large crystals

Question 11

How is external igneous rock formed

Answer 11

Magma reaches the earths surface becoming lava and cools quickly in air or underwater , therefore has small crystals

Question 12

Explain the difference in crystal size using particles

Answer 12

When rock is a liquid the particles are free to move about however as it cools down bonds start to strengthen and the particles get fixed in place . If rock cools down slowly there is more time for particles to move and stock in an ordered arrangement making large crystals

Question 13

How is metamorphic rock formed

Answer 13

When igneous or sedimentary are compressed by earths movements .

Question 14

Examples of sedimentary rock

Answer 14

Limestone mudstone

Question 15

Examples of metamorphic are

Answer 15

Gneiss schist

Question 16

Examples of igneous

Answer 16

Gabbro granite

Question 17

What is creationism

Answer 17

Many religion believe that god created the world however all rocks on the earth are not the same age so unlikely

Question 18

Catastrophism

Answer 18

Shape of the earth was formed by a series of sudden catastrophes

Question 19

Uniformitarianism

Answer 19

Many years to happen using weathering transportation and sedimentation

Question 20

Modern ideas

Answer 20

Uniformitarianism and catastrophism together

Question 21

Plate tectonics

Answer 21

Surface if earth split into several plates which move and are driven by convection currents

Question 22

What is the rock cycle

Answer 22

All processes to makes sedimentary igneous and metamorphic are LinkedIn d

Question 23

2 types of igneous

Answer 23

Extrusive

Intrusive