Some farmers keep cows indoors in large shelters - AQA - GCSE Biology - Question 4 - 2023 - Paper 2
Question 4
Some farmers keep cows indoors in large shelters.
Other farmers keep cows outdoors in fields of grass.
Figure 6 shows cows being kept indoors and outdoors.
Table 3... show full transcript
Worked Solution & Example Answer:Some farmers keep cows indoors in large shelters - AQA - GCSE Biology - Question 4 - 2023 - Paper 2
Step 1
Calculate the total energy input for keeping cows outdoors.
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Answer
To find the total energy input for keeping cows outdoors, we refer to Table 3. The input for cows kept outdoors is stated as 5,950 kJ/m²/year. Therefore:
Total energy input = 5,950 kJ/m²/year.
Step 2
Calculate the percentage efficiency of keeping cows indoors.
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Answer
To calculate the percentage efficiency, we use the formula:
extpercentageefficiency=(total energy inputenergy output)×100
Given that the energy output for cows kept indoors is 40 kJ/m²/year and the total energy input is 16,000 kJ/m²/year, we can substitute the values:
percentage efficiency=(1600040)×100=0.25
Thus, the percentage efficiency of keeping cows indoors is 0.25%.
Step 3
Why is it more efficient to keep cows indoors than to keep cows outdoors?
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Answer
The two statements that indicate why it is more efficient to keep cows indoors are:
Cows move less indoors.
It is warmer indoors.
Step 4
Suggest why diseases spread more quickly when cows are kept indoors.
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When cows are kept indoors, they are in closer proximity to one another, which can facilitate the spread of diseases. The confined space and overcrowding can create a more stress-inducing environment, further lowering their immune systems making them more susceptible to illness.
