Weathering

Question 1

Give ONE word describing a very small piece of something

Answer 1

particle

Question 2

Give ONE word describing a small piece broken off something

Answer 2

Fragment

Question 3

Give ONE word to explain when something is affected by heat

Answer 3

thermal

Question 4

Explain what FRACTURING means

Answer 4

splitting or cracking something

Question 5

What do you call an accumulation of loose stones or rocky debris lying on a slope or
at the base of a
hill or
cliff?

Answer 5

scree

Question 6

What is physical weathering??

Answer 6

It is a PHYSICAL breaking down of rocks…. into smaller particles, without changing the chemical composition of the rock

Question 7

What are the CAUSES of physical weathering?

Answer 7

1) changing in TEMPERATURE
2) WETTING and DRYING of the rock
3) FREEZING and THAWING of water
4) ground ICE

Question 8

Name 4 types of Physical Weathering

Answer 8

1) Granular disintegration

2) Pressure release (exfoliation)

3) Peeling off (exfoliation)

4) Freeze - thaw weathering

Question 9

What is GRANULAR DISINTEGRATION?

Answer 9

Breaking up of rocks into pieces to form sand

Question 10

Explain PRESSURE RELEASE (EXFOLIATION)

Answer 10

Rocks (such as granite) are formed deep in the earth’s crust. The rocks are UNDER a lot of pressure.
When the pressure is released, the rocks fractures

Question 11

Explain PEELING OFF (EXFOLIATION)

Answer 11

**Rocks peel off in flat sheets
**The top layers are peeled like an onion
**Peeling is caused by the rocks heating up during the day and cooling off
at night, this way, cracks are formed on the rocks

Question 12

What is FREEZE-THAW weathering?

Answer 12

It is the breaking up of rocks due to freezing and thawing effect of WATER in the tiny cracks in the rocks:
How does it happen &raquo_space;> liquid in the cracks freezes when temperatures
reduce below freezing point
&raquo_space;> liquid is now in a solid state (ICE), the ice causes
pressure against the rock
&raquo_space;> the rock starts to crack

Question 13

What kind of weathering do you find when the rocks are broken down into small particles with a different mineral/chemical composition?

Answer 13

CHEMICAL weathering

Question 14

Name the THREE agents of Chemical Weathering

Answer 14

1) Water
2) Oxygen
3) Carbon Dioxide

Question 15

Name 3 types of Chemical Weathering

Answer 15

1) Solution
2) Limestone pavement with grites and clints
3) Honeycomb

Question 16

What are the agents of CHEMICAL weathering?

Answer 16

1) Water
2) Oxygen
3) Carbon dioxide