What is the tape in Figure 4 used for in this investigation?
Suggest one change the student could make to ensure the quadrats are placed randomly - AQA - GCSE Biology - Question 3 - 2018 - Paper 1
Question 3
What is the tape in Figure 4 used for in this investigation?
Suggest one change the student could make to ensure the quadrats are placed randomly.
Ho... show full transcript
Worked Solution & Example Answer:What is the tape in Figure 4 used for in this investigation?
Suggest one change the student could make to ensure the quadrats are placed randomly - AQA - GCSE Biology - Question 3 - 2018 - Paper 1
Step 1
What is the tape in Figure 4 used for in this investigation?
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Answer
The tape is used to measure the length or area of the field.
Step 2
Suggest one change the student could make to ensure the quadrats are placed randomly.
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Answer
The student could use a random number generator or a coordinates method to ensure the quadrats are placed randomly.
Step 3
How could the student improve the investigation so that a valid estimate can be made? Tick two boxes.
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Answer
Compare their results with another student’s results.
Place more quadrats.
Step 4
Calculate the estimated number of clover plants in the school field.
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Answer
To find the estimated number of clover plants in the school field, we can use the formula:
ext{Number of clover plants} = rac{ ext{Area of school field}}{ ext{Area of quadrat}} imes ext{Number of clover plants in quadrat}
Given that the area of the school field is 500 m², the area of the quadrat is 0.25 m², and assuming 5 clover plants were found in a quadrat:
Calculate the number of quadrats that fit in the school field:
ext{Number of quadrats} = rac{500}{0.25} = 2000
The total estimated number of clover plants would be:
extEstimatednumberofcloverplants=2000imes5=10000
Thus, the closest option is 40.
Step 5
Suggest which quadrat could have been placed under the shade of a large tree.
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Answer
Quadrat number 5. Many plants thrive in shaded areas, hence having very few or only 2 growing.
