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Figure 14 shows a rock found by a student on a beach - AQA - GCSE Physics - Question 10 - 2022 - Paper 1
Question 10
Figure 14 shows a rock found by a student on a beach. To help identify the type of rock, the student took measurements to determine its density. 1. Describe a metho... show full transcript
Worked Solution & Example Answer:Figure 14 shows a rock found by a student on a beach - AQA - GCSE Physics - Question 10 - 2022 - Paper 1
Step 1
Describe a method the student could use to determine the density of the rock.
Answer
To determine the density of the rock, the student could follow these steps:
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Weigh the rock: Use a balance or scale to measure the mass of the rock accurately.
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Measure initial volume: Fill a measuring cylinder with a known volume of water and record this initial volume.
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Submerge the rock: Carefully place the rock into the measuring cylinder and measure the new water level.
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Calculate volume of the rock: The volume of the rock can be determined by subtracting the initial volume of water from the new water level. This gives the displaced volume, which is equal to the volume of the rock.
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Calculate density: Use the formula for density, which is given by: ext{Density} = rac{ ext{Mass}}{ ext{Volume}}
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Record data: Document all measurements and calculations for reference.
Step 2
Step 3
Step 4
Explain why taking the measurements more than once may improve the accuracy of the density value.
Answer
Taking measurements multiple times can reduce random errors. By averaging the results of several measurements, the student can minimize the impact of any anomalies or inaccuracies that may have occurred during a single measurement. This helps in achieving a more reliable and accurate density value.