Impact of people on soil erosion

Question 1

Explain what SOIL EROSION is

Answer 1

NATURAL process when material is removed from the earth’s surface

Question 2

Why is soil a NON-RENEWABLE resource?

Answer 2

Soil takes very long to form.

(When it is destroyed, it is gone forever)

Question 3

Human activities causes soil erosion to occur much FASTER.
Name 3 human activities.

Answer 3

1) Farming
2) Mining
3) Construction

Question 4

Name specific FARMING activities that causes soil erosion.
(there are 6 activities)

Answer 4

• Overgrazing
  ** Mono-cropping
  *** Pesticides & Fertilizers
  ** Downslope Ploughing
  *** Overhead Irrigation
  ** Farm equipment

Question 5

Explain how OVERGRAZING causes soil erosion

Answer 5

Too many ANIMALS decrease the vegetation, then the soil is exposed to wind and water

Question 6

Explain how MONO-CROPPING causes soil erosion

Answer 6

One type of crop reduce the fertility of the soil

Question 7

Explain how PESTISIDES AND FERTILISERS causes soil erosion

Answer 7

It kills the micro-organisms in the soil.

The micro-organisms keep the soil healthy.

Question 8

Explain how DOWNSLOPE PLOUGHING causes soil erosion

Answer 8

As there is no ridges/barriers to keep the soil in place, the ploughing easy pushes the soil down the slope

Question 9

Explain how FARM EQUIPMENT causes soil erosion

Answer 9

As tractors are heavy, it compacts the soil. It makes it difficult for the crop to grow.

Question 10

Explain how MINING causes soil erosion

Answer 10

Mining is loosening the soil, which is exposing it to water and wind

Question 11

Explain how CONSTRUCTION causes soil erosion

Answer 11

ARTIFICIAL SUFACES&raquo_space; artificial surfaces cause more run of; more
erosion

DEFORESTATION»>Vegetation (plants/trees) holds the soil
together. When it is removed, it causes
surface runoff and erosion

Question 12

Explain the impact of a RAINDROP on BARE soil

Answer 12

Impact of a BOMB

# The immediate soil is LOOSENED
# Soil is washed down SLOPES
# Ends up in SEA or valley

Question 13

How can soil erosion be prevented? (7 marks)

Answer 13

1) Contour PLOUGHING =======
2) GRASS STRIPS between ploughed land
3) Ensure there are always PLANTS growing in the rich soil
4) Prevent OVERGRAZING
5) Conserve WETLANDS
6) Native plants on the RIVER BANKS
7) TAR or PAVE gravel roads

Question 14

Give a definition of SOIL EROSION

Answer 14

Natural process
when material is removed
from the earth’s surface

Question 15

What is deforestation?

Answer 15

Taking out of trees

Question 16

Name 3 landforms that are caused by EROSION

Answer 16

$ beach
$$ meander
$$$ striation

Question 17

Name 3 landforms that are caused by DEPOSITION

Answer 17

1) C
L
I
F
F
2) moraine
3) longitudinal D
U
N
E