B3.4 Humans And Their Enviroment

Question 0

What are the issues with population increase?

Answer 0

More land use
More demand for resources
More pollution
More waste

Question 1

Why is the population increasing?

Answer 1

Infrastructure is improving
More children
Live longer
Better health care

Question 2

Why is there increase land use?

Answer 2

More people
Food
Mining
Quarrying
Landfills

Question 3

Why is there more resource demand?

Answer 3

Higher standard of living eg. Cars, technology, more hygiene
Fossil fuels being used

Question 4

What does more waste do?

Answer 4

More landfills
More sewage
Toxic chemicals
Damages food chains

Question 5

What’s bioaccumulation?

Answer 5

Small amounts if chemicals in water, along the food chain more is present so could be harmful

Question 6

What can air pollution cause?

Answer 6

Acid rain
( they now collect it and make plaster board which is calcium sulphate)
Global dimming- particulates from burning

Question 7

Why does deforestation and peat destruction increase carbon dioxide levels?

Answer 7

Burning releases CO2
Less plants and they photosynthesise
Dead vegetation decays

Question 8

What can produce methane?

Answer 8

Cattle

Micro organisms in rice fields

Question 9

What happens when peat bogs are destroyed?

Answer 9

They are huge carbon sinks
Burned
CO2 released
Sold as fertiliser

Question 10

What are the effects of global warming?

Answer 10

Climate change
Rising sea levels
Reduced diversity
Changes in migration
Changes in distribution

Question 11

When is ethanol made?

Answer 11

Fermentation

When micro organisms respire in anaerobic conditions

Question 12

Pro’s of biofuels?

Answer 12

Renewable
Carbon neutral
Sustainable
Lower fuel price
Good in rural areas

Question 13

Con’s of biofuels?

Answer 13

Uses land
Low yield
Flammable
Hard to store
No infrastructure

Question 14

Where’s biogas from?

Answer 14

When micro organisms decompose dead plants or animal waste

Question 15

What’s biogas ?

Answer 15

Flammable gases

Mainly methane

Question 16

Uses of biogas?

Answer 16

Cooking, heating, electricity

Question 17

How is biogas made?

Answer 17

In anaerobic digestion
At 30 degrees
Manure in make bubbles and the gas collected is biogas

Question 18

Why is biogas boos for poor countries?

Answer 18

From cow poo
Cheap
Simple
Sustainable
Slurry can be used on crop as fertiliser

Question 19

Why does biomass decrease along the food chain?

Answer 19

Lost in:
Respiration
Movement
Growth
Excretion 
Making new tissue

Question 20

Is it more efficient to make food from plants or animals?

Answer 20

Plants

Question 21

How can you reduce energy loss of food?

Answer 21

Stop animals moving

Keep warm surroundings

Question 22

Problems with animals in cramps conditions?

Answer 22

Heating costs
More distress so more drugs which may affect the food
Cost more for medicine care

Question 23

Problems with free range animals?

Answer 23

Expensive
More muscles
Use more energy

Question 24

Why has fishing increased?

Answer 24

Population increase
Better technology
Staple part of the diet

Question 25

How are fish protected?

Answer 25

Larger holes in fishing nets
Banning fishing in breeding season
Protective breaking grounds
Prosecution of people who overfish
Total amount of fish allowed to be caught a year
Monitor fish boats so they don’t cross into another countries waters

Question 26

What’s mycoprotein?

Answer 26

Protein from fungus (fusarium)

Question 27

Where is fusarium from?

Answer 27

Grown in glucose syrup

Then it’s harvested and purified

Question 28

What are the good things are mycoproteins?

Answer 28

Can be different textures and flavours
Low in fat
Cheap to make
Vegetarian

Question 29

How are mycoproteins made?

Answer 29

In a machine
Motor mixes it
Fungus respire aerobically
Tap at the bottom to collect the protein