IGCSE Physics 0625 Paper 33, May/June 2026

Figure 1.1 shows the speed–time graph for a student in a race. Determine the speed of the student at $\text{time}=1.0\text{s}$. $$\text{speed}=\text{................................................. m/s}$$

Describe the speed of the student between: • $\text{time}=2.0\text{s}$ and $\text{time}=8.0\text{s}$ ......................................................................................... • $\text{time}=8.0\text{s}$ and $\text{time}=11\text{s}$ ..........................................................................................

Calculate the distance travelled by the student between $\text{time}=2.0\text{s}$ and $\text{time}=8.0\text{s}$. $$\text{distance}=\text{..................................................... m}$$

In a different race, the student runs a distance of $400\text{m}$ in a time of $2.0\text{ minutes}$. Calculate the average speed of the student. Give your answer in $\text{m/s}$. $$\text{average speed}=\text{................................................. m/s}$$

A machine lifts a block of ice as shown in Figure 2.1. The weight of the block of ice is $650\text{N}$. The machine lifts the block of ice a vertical height of $1.2\text{m}$. Calculate the work done on the block of ice. Include the unit. $$\text{work done}=\text{.................................. unit ..............}$$

Calculate the mass of the block of ice. $$\text{mass}=\text{.................................................... kg}$$

Another block of ice is lying on the ground, as shown in Figure 2.2. The weight of the block of ice is $650\text{N}$. Calculate the pressure on the ground caused by the block of ice in the position shown in Figure 2.2. $$\text{pressure}={\text{............................................... N/m}}^2$$

The scientist measures the mass of the pebble. State the name of a suitable instrument for measuring the mass of a pebble.

The scientist measures the volume of the pebble. The scientist has a measuring cylinder, a beaker containing water and a displacement can, as shown in Figure 3.1. Describe how to determine the volume of the pebble, using any of the equipment in Figure 3.1.

The scientist’s measurements are shown. $$\text{mass of pebble}=120\text{g}$$ $$\text{volume of pebble}=52{\text{cm}}^3$$ Calculate the density of the pebble. $$\text{density of the pebble}={\text{............................................... g/cm}}^3$$

A hot furnace heats some solid metal until the metal becomes liquid. Name the process by which a solid becomes a liquid.

A craftsman pours the liquid metal into a mould, as shown in Figure 4.1. The metal cools until it is solid. Describe the arrangement, separation and motion of the particles in a solid.

State the term for the lowest possible temperature.

State the value, in °C, of the lowest possible temperature. $$\text{lowest possible temperature}={\text{.................................................... }}^{\circ }\text{C}$$

State the name of the process of thermal energy transfer from the Sun to the copper pipe.

The surface of the copper pipe is black. Explain why the surface of the copper pipe is black.

State the name of the process of thermal energy transfer through the copper.

Explain why the hot water is at the top of the tank. Use your ideas about the density of water.

Complete the labelling in Figure 6.1.

State the property of electromagnetic waves that increases in the direction of the arrow in Figure 6.1.

Compare the speed of X-rays with the speed of radio waves in a vacuum. Complete the sentence. In a vacuum, the speed of X-rays is ...................................................................................

The different regions of the electromagnetic spectrum have different uses. Describe one use for X-rays.

Energy emitted by the Sun is mostly in three regions of the electromagnetic spectrum. State the three regions. 1 ................................................................................................................................................ 2 ................................................................................................................................................ 3 ................................................................................................................................................

Figure 7.1 shows a ray of light striking a plane mirror. State the name of the dashed line AB in Figure 7.1.

On Figure 7.1, indicate the angle of incidence by writing an X.

State the law of reflection.

A child places a toy in front of a plane mirror. State three characteristics of the image formed by the plane mirror. 1 ........................................................................................................................................ 2 ........................................................................................................................................ 3 ........................................................................................................................................

An object O is close to a converging lens. Figure 7.2 shows a ray of light from the object passing through the converging lens. State the name of the line labelled XY.

On Figure 7.2, draw another ray from the top of O and continue the ray until it crosses the path of the ray in Figure 7.2.

The converging lens forms an image of object O. On Figure 7.2, draw an arrow to represent the image of O and label it I.

On Figure 7.2, indicate one principal focus for the converging lens. Indicate the principal focus by writing an F.

Calculate the resistance of the heater. $$\text{resistance}=\text{..................................................... }\mathrm{\Omega }$$

Calculate the power of the heater. $$\text{power}=\text{..................................................... W}$$

The current in the heater is large. Give one reason why large currents can be dangerous.

The live wire connects to a fuse which protects the circuit. Explain how a fuse protects the circuit.

The current in the heater is normally $11.5\text{A}$. State a suitable value for the fuse. Choose one of these values: $5\text{A}$, $10\text{A}$, $13\text{A}$ or $30\text{A}$.

Table 9.1 shows some features of three types of radioactive emission. The table is incomplete. Table 9.1

Complete Table 9.1 by adding the missing information.

The nuclide notation for lithium-7 is: $${}_3^7\text{Li}\mathrm{.}$$ Determine the number of protons in a nucleus of lithium-7. $$\text{number of protons}=\text{.........................................................}$$

Determine the number of neutrons in a nucleus of lithium-7. $$\text{number of neutrons}=\text{.........................................................}$$

The isotope radium-223 is radioactive and has a half-life of 11 days. Calculate the fraction of a sample of radium-223 that remains after 33 days. $$\text{fraction remaining}=\text{.........................................................}$$

State the approximate time taken for the Moon to orbit the Earth. Include the unit. $$\text{time}=\text{.................................. unit ..............}$$

Name the force that keeps the Moon in orbit around the Earth.

A spacecraft on the Moon sends a radio signal to the Earth. The radio signal takes $1.28\text{s}$ to travel from the Moon to the Earth. The speed of the radio signal is $3.0\times {10}^8\text{m/s}$. Calculate the distance from the Moon to the Earth. $$\text{distance}=\text{..................................................... m}$$