Life On Earth- Agriculture And Indicators

Question 0

What is monoculture?

Answer 0

Monoculture is growing a single crop or plant species over a wide area for a large number of years

Question 1

Name 5 advances in agriculture

Answer 1

• monoculture
• increased use of fertilisers
• increased field size
• use of GM crops
• advancement in machinery

Question 2

What are 2 advantages of monoculture?

Answer 2

It simplifies what machinery can be used

It reduces labour costs

Question 3

What is a disadvantage of monoculture?

Answer 3

It decreases the biodiversity of an area

Question 4

Give 3 features of intensive farming

Answer 4

• growing high crop yield in monocultures
• lots of chemical fertilisers
• animals are close together

Question 5

What are the two categories of fertiliser?

Answer 5

Organic and chemical

Question 6

What substances to fertilisers contain?

Answer 6

Nitrogen
Phosphorus
Potassium

NPK!

Question 7

What problem environmentally can fertilisers cause?

Answer 7

Algal bloom

Question 8

When fertilisers are washed into streams etc what is this called?

Answer 8

Leaching

Question 9

The rapid growth of algae and them thriving in conditions is called …,,

Answer 9

Eutrophication

Question 10

What does nitrogen help?

Answer 10

Leaf growth

Question 11

What does phosphorus help?

Answer 11

Root growth

Question 12

What does potassium help?

Answer 12

Fruit and flower growth

Question 13

Name a chemical pesticide

Answer 13

DDT

Question 14

Name an organic pesticide

Answer 14

Biological control

Question 15

What is biological control

Answer 15

Farmers introduce natural predators of the pest to control pest numbers

Question 16

What is bioaccumulation?

Answer 16

The build up of pesticide in top predators

Question 17

What is an indicator species?

Answer 17

The presence or absence of a species that can indicate the conditions of an environment

Question 18

What do mayfly and stonefly nymphs indicate?

Answer 18

Clean water

Question 19

What do freshwater shrimp and caddis fly larva indicate?

Answer 19

Partly polluted water

Question 20

What do the bloodworm and waterlouse indicate?

Answer 20

Badly polluted water

Question 21

What do the sludgeworm and rat-tailed maggot indicate?

Answer 21

Very badly polluted water

Question 22

What do lichen on trees indicate?

Answer 22

Sulphur dioxide levels

Question 23

What lichen indicates zero or very low so2?

Answer 23

Hairy

Question 24

What lichen indicates low so2?

Answer 24

Shrubby

Question 25

What lichen indicates medium so2?

Answer 25

Leafy

Question 26

What lichen indicates high so2?

Answer 26

Crusty

Question 27

What are GM crops?

Answer 27

They are plants which have had their DNA modified to give the plant a new trait

Question 28

Name a benefit of GM crops

Answer 28

They could help feed developing countries

Question 29

Name a disadvantage of GM crops

Answer 29

They may have unpredictable health risks