Human Activities

Question 1

Biodiversity:

Answer 1

Variety of species on the Earth or within an ecosystem.

Question 2

High biodiversity

Answer 2

Stability of ecosystems

Reducing the interdependence of

Food
Shelter
Maintenance

Question 3

Programs to maintain biodiversity

Answer 3

Breeding endangered species
Protection + Regeneration of rare habitats
Reintroduction of field margins and hedgerows in agricultural areas
Reduction of deforestation + CO2 emissions
Recycling resources

Question 4

Destruction of peat bogs

Answer 4

Produces garden compost
Reduces area of this habitat
Reduces biodiversity

Question 5

Burning peat

Answer 5

Releases CO2

Question 6

Cheap/available compost

Answer 6

Conflict to increase food production VS need to conserve habitats + reduce CO2 emissions

Question 7

Human population increased

Answer 7

in past 200y

Question 8

Better farming

Answer 8

More food

Question 9

Treat and prevent

Answer 9

Diseases

Question 10

No natural

Answer 10

Predators

Question 11

More huamns

Answer 11

More waste

Question 12

Pollutants of land

Answer 12

Toxic chemicals and sewage

Question 13

When fossil fuels burned

Answer 13

CO2 and sulfur dioxides and nitrogen oxides released

Question 14

What happens to the sulfur dioxide and nitrogen oxides

Answer 14

Dissolves in rainwater and reacts w oxygen to form dilute nitric and sulfuric acid

Question 15

Pollutants of air

Answer 15

Smoke and acidic gas

Question 16

Pollutants of gas

Answer 16

Landfill

Question 17

Why are tropical areas deforested

Answer 17

Timber
Farmland, for rice and biofuels

Question 18

How does deforestation increase CO2 levels

Answer 18

Trees lock up CO2 in wood
No photosynthesis from dead tree = less CO2 locked in

Increase in CO2 released to atmosphere
Burning and decaying.

Question 19

How does decay release CO2

Answer 19

Microorganisms, e.g. bacteria and fungi releasing CO2 through respiration

Question 20

How does deforestation affect biodiversity

Answer 20

Decreases it through removing habitats

Question 21

What could global warming cause

Answer 21

Sea levels rising
Drought
Climate change
Decreased biodiversity
Changed migration patterns
Changes in species distribution

Question 22

Food security

Answer 22

Having enough food to feed a population

Question 23

Reasons for food insecurity

Answer 23

Increasing birth rate
Changing diets in developed country
New pest and pathogens
Cost of agricultural input (fertiliser, feed, pesticide)
Conflicts affecting availability of food

Question 24

fish fish blub blub (How are we going to maintain fish stocks?)

Answer 24

Quotas
Controls on fish net size (larger)

Question 25

What happens if we don't maintain fish stocks?

Answer 25

Breeding stops Some species will go extinct

Question 26

Ways to improve efficiency of food production

Answer 26

Reducing number of stages in a food chain -> Less biomass lost in each stage of the food chain Restricting energy transferred from food animals to environment [ methods in separate question ]

Question 27

How can the energy transferred from food animals to their environment be restricted?

Answer 27

Limiting movement Warm surroundings Feeding them high protein foods to increase their growth