TERM 4 - UNIT 1 - Resource uses (p70-p75)

Question 1

EXPLAIN Resource

Answer 1

Something of VALUE that needs to be consumed to obtain a benefit from it

Question 2

EXPLAIN Needs

Answer 2

ESSENTIAL to our survival (food, shelter)

Question 3

What is global warming?

Answer 3

Warming of the earth’s atmosphere & oceans

Question 4

What is an ECOSYSTEM?

Answer 4

Living and non-living organisms interact with one another

Question 5

What are NON-RENEWABLE RESOURCES, and provide some examples

Answer 5

• cannot be produced
• fossil fuels (coal ; petroleum)
• minierals (iron; gold)

Question 6

What are RENEWABLE RESOURCES, and provide some examples

Answer 6

• Part of NATURAL environment
• continuous (flow of nature- example: water)
• sustained (nature replaces it)

Question 7

What are NON-RENEWABLE RESOURCES, and provide some examples

Answer 7

• cannot be produced
• fossil fuels (coal ; petroleum)
• minerals (iron; gold)

Question 8

What non-renewable resources are ALWAYS present?

Answer 8

Soil
Son
Wind

Question 9

What are the effects of UNWISE use of resources?

Answer 9

1) Tragedy of the commons -
People deplete limited resources in their own self-
interest
2) Over-fishing the oceans -
Taking too many fish out of the system
Non-sustainable use of the oceans
Commercial & non-commercial fishing too many
adult fish, not enough to breed

Question 10

What causes OVER-FISHING?

Answer 10

Fishing fleets are 2-3 times larger than needed to take catches of fish

Question 11

Why is OVER-FISHING a problem?

Answer 11

• almost 80% of fisheries are depleted
• losing ecosystems, health of oceans are under
  stress, losing valuable food source

Question 12

What does OVER-FISHING mean?

Answer 12

• Taking too many fish out of the system
• non-sustainable use of the oceans

Question 13

Describe how the vicious cycle of OVER-FISHING results in a smaller fish population

Answer 13

> Commercial fishing fleets: use sophisticated means
(large nets)
Fishing fleets are increased (more food available)
Reduces the market price (lower profits)
The need to catch more and more, leads to smaller
fish population

Question 14

What controls can be put in place to stop the vicious cycle of over-fishign?

Answer 14

• Quotas
• International treaties

Question 15

Name some fishng techniques that have caused OVER-FISHING?

Answer 15

• Purse-seine fishing
• Drift net fishing
• Trawler fishing
• Fish farming
• Long line fishing

Question 16

What is OVER-GRAZING?

Answer 16

Plants are exposed to grazing without TIME for recovery

Question 17

What is BIODIVERSITY?

Answer 17

The number and type of DIFFERENT species

Question 18

What is DESERTIFICATION?

Answer 18

Process in which land becomes increasingly DRY until little vegetation grows making the land like a desert

Question 19

Explain the vicious cycle of OVER-GRAZING

Answer 19

Over-Grazing -> Less Grass -> Soil Erosion -> Lower productivity -> More livestock needed

Question 20

What are the CAUSES of OVER-GRAZING?

Answer 20

• poorly managed agricultural areas
• tragedy of the commons(seen as wealth to have
  lots of cattle)
• over population of wild animals
• greed
• size of farm (too small)

Question 21

EFFECTS of OVER-GRAZING

Answer 21

• soil erosion
• desertification
• dust storms
• nutritious plants REPLACED by less favourable
  plants
• animals starve and die

Question 22

How does OVER-GRAZING reduce BIODEVERSITY?

Answer 22

• animals eat the moist plants first, as soon as these
  plants have new growth
• nutritious plants REPLACED by less favourable
  plants

Question 23

How does OVER-GRAZING lead to DESERTIFICATION

Answer 23

• Over-grazing REDUCE PLANT COVER, causes
  soil erosion
• eventually very little grows, causing desertification