Unit 3 - Key Area 1 (Food)

Question 1

Change in technology to increase global food production involving use of chemicals by farmers including pesticides and fertilisers.

Answer 1

Agrochemicals

Question 2

Occurs when too many nutrients (nitrates and phosphates) enter the water allowing more algae to grow.

Answer 2

Algal bloom

Question 3

The farming of aquatic animals and plants in fresh, brackish or marine water environments under controlled environments. This may involve use of high density cages, pesticide use, selective breeding, GM and hormone use.

Answer 3

Aquaculture

Question 4

When a pollutant is stored in an organisms tissues at a faster rate than it can be metabolised.

Answer 4

Bioaccumulation

Question 5

This increases when the number of bacteria in water increases as a result of organic waste.

Answer 5

Biological oxygen demand (BOD)

Question 6

When the level of a pollutant gets higher at each trophic level.

Answer 6

Biomagnification

Question 7

A method used in intensive agriculture to increase crop yields involving changing the crop grown in an area regularly.

Answer 7

Crop rotation

Question 8

When farmers change their farming practices to include non-farm related activities to help increase their income.

Answer 8

Diversification

Question 9

The process of nutrient enrichment of water caused by increased levels of nitrates and phosphates.

Answer 9

Eutrophication

Question 10

Change in technology to increase global food production involving the production of new species using genetic engineering.

Answer 10

Genetic modification (GM)

Question 11

Change in technology to increase global food production involving growing crops that produce high yields.

Answer 11

High yield varieties

Question 12

Change in technology to increase global food production involving growing plants in mineral nutrient solutions rather than soil.

Answer 12

Hydroponics

Question 13

Strategy to increase global food production involving increased field size, crop rotation, drainage, hedgerow removal, cultivation of marginal land, conservation practices and diversification.

Answer 13

Intensive agriculture

Question 14

Land around the edges of cultivated land which may be less suitable for farming.

Answer 14

Marginal land

Question 15

Change in technology to increase global food production involving use of more machinery in agriculture.

Answer 15

Mechanisation

Question 16

The process of metabolism which is the total reactions that take place in a living thing.

Answer 16

Metabolisation

Question 17

Adding more nutrients.

Answer 17

Nutrient enrichment

Question 18

Compound that is resistant to environmental degradation. E.g. pesticides.

Answer 18

Persistent organic pollutants (POP’s)

Question 19

A waste material that can cause harm to the environment.

Answer 19

Pollutant

Question 20

Change in technology to increase global food production involving changing species by deliberately selecting individuals who have desirable characteristics. E.g. Breeding cows for increased milk production.

Answer 20

Selective breeding

Question 21

Things can keep going and be used in the future.

Answer 21

Sustainability

Question 22

Sustainable development aims to improve standards of living and quality of life without wasting resources or harming the environment.

Answer 22

Sustainable development

Question 23

An energy level or stage in a food chain/web.

Answer 23

Trophic level