AQA GCSE Trilogy Physics Paper 1 Higher June 2018 question paper 8464/P/1H

Figure 1 shows two models of the atom.

Write the labels on Figure 1 Choose the answers from the box.

Explain why the total positive charge in every atom of an element is always the same.

The results from the alpha particle scattering experiment led to the nuclear model. Alpha particles were fired at a thin film of gold at a speed of 7% of the speed of light. Determine the speed of the alpha particles. Speed of light = 300 000 000 m/s

Figure 2 shows two atoms represented as solid spheres.

A hydrogen atom has a radius of 2.5 × 10^–11 m Determine the radius of a magnesium atom. Use measurements from Figure 2

A student wanted to determine the density of the irregular shaped object shown in Figure 3

Plan an experiment that would allow the student to determine the density of the object.

Another student did a similar experiment. He determined the density of five common plastic materials. Table 1 shows the results.

Figure 4 shows the results plotted in a bar chart.

Complete Figure 4 You should:

• Write the correct scale on the y-axis.

• Draw the bars for polyester, polystyrene and PVC.

The student is given a piece of a different plastic material. The student determined the density of the material three times. Table 2 shows the results.

Determine the uncertainty in the student’s results.

Figure 5 shows a diver. The diver is using a canister of compressed air so that he can breathe underwater.

Which two sentences describe the movement of the air particles in the canister? Tick two boxes.

The temperature of the air inside the canister increases. What happens to the movement of the air particles?

It could be dangerous if the temperature of the air inside the canister increased by a large amount. Explain why.

A canister of air was tested to find out how the pressure changed when it was used by a diver.

• Air was allowed to escape from the canister.

• The pressure of the air in the canister was recorded every 5 minutes for 80 minutes.

Figure 6 shows the results.

Estimate the atmospheric pressure. Use Figure 6

Divers can safely stay underwater until the pressure of the air in the canister has reduced to 25% of its original value. Determine the maximum time the diver can safely stay underwater. Use Figure 6

What happens to the volume of the air when it is released from the canister?

The Chernobyl disaster was a nuclear accident that happened in 1986 Radioactive isotopes were released into the environment. The radioactive isotopes emitted alpha, beta and gamma radiation.

What is an alpha particle? Tick one box.

Which statement about beta radiation is true? Tick one box.

Which statement about gamma radiation is true? Tick one box.

Table 3 shows the half-lives of two of the radioactive isotopes that contaminated the environment.

A soil sample was taken from the area around Chernobyl in 1986 The soil sample was contaminated with equal amounts of caesium–137 and iodine–131 Explain how the risk linked to each isotope has changed between 1986 and 2018 Both isotopes emit the same type of radiation.

Determine the year when the activity of the caesium–137 in the soil sample will be 1/32 of its original value.

Figure 7 shows cavity wall insulation being installed in the wall of a house.

Explain how the wall reduces unwanted energy transfers.

The cavity insulation was tested.

• The heating inside the house was switched off.

• The temperature inside the house was measured every 20 minutes for 2 hours.

Table 4 shows the results.

Determine the temperature inside the house after 30 minutes.

Figure 8 shows the gas boiler used to heat the house.

Describe how different energy stores are changed by the boiler.

To heat the house, the boiler transfers 15 MJ of energy in 10 minutes. Calculate the power of the boiler. Write any equation that you use.

A student built a circuit using filament lamps.

Sketch a current potential difference graph for a filament lamp on Figure 9

Figure 10 shows the circuit with two identical filament lamps.

Compare the currents I₁, I₂ and I₃

Calculate the charge that flows through the cell in 1 minute. Each filament lamp has a power of 3 W and a resistance of 12 Ω Write any equations that you use. Give the unit.

The student builds a different circuit. Figure 11 shows the circuit.

Explain how the readings on both meters change when the environmental conditions change.