June 2023 Paper 1 - Particle Model of Matter

Question 1

02)

Figure 2 box shows the equipment a student used to determine the
specific heat capacity of iron.
The iron block the student used has two holes, one for the heater and one for
the thermometer.

Figure 2
0 2 . 1 Before the power supply was switched on, the thermometer was used to measure the
temperature of the iron block.

The student left the thermometer in the iron block for a few minutes before recording
the initial temperature.

Suggest why [1]

Answer 1

Mistake: I wasn’t specific enough.
I thought that the iron block has a digital device that tell us the temperature but turns out its a thermometer.

Answer: So that that thermometer was the same temperature as the iron block. [1]

Question 2

Question - 02.3

The student repeated the investigation but wrapped insulation around the iron block.
What effect will adding insulation have had on the investigation?
[2 marks]
Tick () two boxes.
The calculated specific heat capacity will be more accurate.

The iron block will transfer thermal energy to the surroundings at a lower rate.

The power output of the heater will be lower than expected.

The temperature of the iron block will increase more slowly than expected.

The uncertainty in the temperature measurement will be greater

Answer 2

Mistake: I didn’t uderstand the effect of the insulation.

Answer 1. The caluclate specific heat capacity will be more accurate.
This is because the insulation will reduce the rate at which the iron block transfers thermal energy to its surroundings

Answer 2 . [ which you got correct]
The iron block will transfer thermal energy to the surroundings at a lower rate.

Question 3

June 2022 Paper 1 Quwstion - 02.1

Describe a method the student could use to determine the density of the irregular rock.
[6 marks]

Answer 3

Mistake. I did not mention the purpouse of the mesuaring cylinder in this experiment.

Measure the mass of the rock using a balance.[1]
Fill part of the meausring cylinder and calculate intial volume.[1]
Place the rock in water and measure the final volume.[1]
Fill the eurka with water level wirh spout.
Place the rock in water and collect displaced water.[1]
The meausring cylinder is used to caluclate the volume of displaced water. [1]
use mass and volume to calculate density [1]