N5 3.5 Food Production

N5 3.5 Food Production

Multiple Choice

Why do we need to increase crop yield?

• To increase biodiversity

• To produce more food

• to feed increasing human population

• To feed cattle

Multiple Select

Select all of the chemicals which can be used to increase crop yield

• Pesticide

• Fertiliser

• Manure

• GM crops

Multiple Select

Select all true statements about fertilisers

• Decrease soil nitrate levels

• Increase soil nitrate levels

• Dissolve in water

• Reduce use of chemicals

Multiple Select

Select all true statements about nitrates

• Plants used to make amino acids

• Animals use to make amino acids

• Enter plant via roots

• Dissolve in water

Multiple Choice

extra nitrates in water cause

• Algal blooms

• Aquatic plants to die

• Decrease biodiversity

• Increase number of bacteria

Multiple Select

Algal blooms (Select all)

• Reduce light levels in water

• Cause Aquatic plants to die

• Decrease biodiversity

• Increase number of bacteria

Multiple Choice

What decreases biodiversity after nitrates enter water

• ReduceD light levels in water

• Fish dying

• Increase in algae

• Increase in number of bacteria

Multiple Choice

how do bacteria decrease biodiversity

• by reducing light levels in water

• Eat the fish

• Eat dead algae & plants

• Use up all the oxygen

Multiple Select

Why are chemical fertilisers used (select all)

• Increase crop yield

• Kill pests

• Cause algal blooms

• To leach into water

Chemical Fertilizers

• Used to increase soil nitrate levels

• Nitrates dissolve in water so can enter roots of plants 

• Plants use nitrates to make amino acids which are needed for protein synthesis 

• Animals also need amino acids for proteins synthesis; animals get amino acids by eating plants

Algal Blooms

• Caused by nitrate leaching into waterways

• This increase in nitrate causes algae populations to grow and form an algal bloom

• The algal blooms blocks light, the reduced light levels kills aquatic plants

• Bacteria in water eat dead plants and algae and increase in number

• The increase in bacteria population reduces biodiversity as the bacteria use up the Oxygen available in the water

Poll

How feel do you understand need to increase crop yield, how fertilisers work, the impact on the environment & alternatives

• Very

• Some

• A little

• Not really

Multiple Choice

Pesticides are used to

• Kill pests

• Feed pests

• Increase nitrate levels

• Cause algal blooms

Multiple Choice

Bio accumulation is the

• Build up toxins in body of organisms

• Leaching of nitrates into waterways

• Killing of pests with pesticide

• Increase in biodiversity

Multiple Select

Select all which are true. Pesticides cause

• Bioaccumulation

• Increase in crop yield

• A build up of toxins in organisms

• An increase in toxicity as move up food chain

Pesticides 

• Are chemicals used to kill pests (Pests are organisms which damage crops) 

• Increase crop yield by protecting crops
  

• Can lead to bioaccumultion - the build up of toxins in organisms over time 
  

• As pesticides are passed up food chains, toxicity increases and can reach lethal levels
  

Multiple Select

Select all of the alternatives to using chemicals to increase crop yield

• Fertiliser

• GM crops

• Biological controls

• Pesticides

Multiple Choice

GM crops means

• Genetically modified

• Greater Mass

• Grows More

• Genetically Matched

Multiple Choice

GM crops reduce need for fertiliser by

• Growing larger/higher yield

• Killing pests which eat them

• Making their own nitrates

• Having new DNA

Multiple Choice

GM crops reduce need for pesticides by

• Growing larger/higher yield

• Killing pests which eat them

• Making their own nitrates

• Having new DNA

Alternatives to chemicals 

• Genetically modified crops are an alternative to chemical fertilisers & pesticides 

• GM crops can be used to increase crop yield withOut needing as much fertiliser

• GM crops can reduce need for chemical pesticides by having genes added which causes the crop to be poisonous 

• Biological controls can also be used instead of pesticides 

• A biological control is the use of living organisms (predators) to kill pests 

Poll

How confident are you in answering questions on Food Production

• Very

• Some

• A little

• Not really