From Rock To Soil

Question 1

What are rocks?

Answer 1

Hard materials made of natural compounds that make up most of the earth’s surface and earth below the surface.

Question 2

Natural compounds

Answer 2

Mixture of minerals

Question 3

Minerals’ existence in rock

Answer 3

Crystal form

Question 4

What is quartz?

Answer 4

Silicon dioxide

Question 5

What are feldspars?

Answer 5

A group of aluminosilicate minerals that contain Calcium, Potassium and Sodium.

Question 6

Uses of rocks

Answer 6

Construction purposes, obtaining metals from ores or gemstones from minerals.

Question 7

Types of rock

Answer 7

Igneous, metamorphic and sedimentary

Question 8

Weathering

Answer 8

Rock broken down by the action of things in its environment.

Question 9

How does the rock cycle help us?

Answer 9

Building materials (limestone, marble, granite), gemstones, uplift gives access to materials, creates soil.

Question 10

Freeze thaw weathering

Answer 10

Freezing and thawing expands cracks in rocks and breaks them up.

Question 11

Reduction in pressure

Answer 11

Causes rock to expand and layers to peel off like an onion, exfoliation.

Question 12

Heating and cooling

Answer 12

Causes expansion and contraction of rock, causes cracks and breaks.

Question 13

What is Biological weathering?

Answer 13

Plants and animals cause rocks to break up by growing in them/ hitting them.