Farming techniques — AQA GCSE Biology
Test yourself on Farming techniques with AQA GCSE practice questions.
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Farming techniques explained
Farmers can reduce energy losses from food animals in two main ways.
Read the full explanation
Limiting movement, for example by housing animals in pens, means less energy is transferred by muscle contraction and movement, so more remains in biomass. Controlling the temperature of their surroundings, for example by keeping sheds warm, means the animals lose less heat to the environment and do not need to respire extra food to stay warm. Both methods increase the proportion of feed energy converted into meat, milk or eggs. Students should explain each method in terms of energy transfer and recognise that these methods raise efficiency, though they may raise ethical and welfare concerns.
Your focus
- Explain how limiting movement reduces energy transfer from food animals.
- Explain how controlling temperature reduces heat loss from food animals.
- Evaluate the use of these methods in terms of efficiency and animal welfare.
Farming techniques exam tips
Marking Points
- State that limiting movement reduces energy transferred by muscle contraction and movement.
- State that controlling temperature reduces heat loss from the animal to the surroundings.
- Explain that less energy lost means more energy stored in biomass for growth.
- Link both methods to improved efficiency of converting feed into useful food products.
- Recognise that these methods may raise animal welfare or ethical concerns that can be evaluated.
Examiner Tips
- 💡For each method, state the energy transfer it reduces and the effect on biomass.
- 💡Use comparative language such as less energy is transferred to the environment, so more is available for growth.
- 💡If asked to evaluate, add a welfare point such as restricted movement may cause distress, then reach a balanced conclusion.
Common Mistakes
- Claiming that limiting movement stops respiration; the correction is that respiration continues but less energy is transferred through movement.
- Saying warm surroundings stop heat loss completely; the correction is that heat loss is reduced, not eliminated.
- Describing temperature control as making animals grow faster without linking it to reduced heat loss and respiration; the correction is to explain the energy transfer pathway.