An ant walks a distance of 90cm in a time of 1 minute at a steady speed. What is its speed?

• 0.011cm/ s

• 0.67cm/ s

• 1.5cm/ s

• 90cm/ s

A shopkeeper places two identical blocks of cheese on a balance. The combined mass of the two blocks of cheese is 240g. Each block measures 2.0cm × 5.0 cm × 10.0cm.

What is the density of the cheese?

A car is driven on a long journey along a horizontal road. The car stops several times on the journey and its engine becomes hot. Which type of energy remains constant during the journey?

• the chemical energy in the fuel tank

• the gravitational energy of the car

• the kinetic energy of the car

• the thermal energy of the engine

Which statement about the evaporation of a liquid is not correct?

• Evaporation happens only at one particular temperature.

• Evaporation happens only at the surface of the liquid.

• Evaporation happens when the more energetic molecules escape from the liquid.

• The energy required for evaporation can cause the liquid to cool.

Hot, liquid wax is allowed to cool to room temperature. The graph shows how the temperature of the wax changes with time. At which labelled point on the graph are both liquid wax and solid wax present?

• A

• B

• C

• D

Which row is correct?

• A

• B

• C

• D

A boat floats on the sea. The boat moves slowly up and down as a wave passes it. The amplitude of the wave is 0.20 m. What is the vertical distance between the highest and lowest positions of the boat as the wave passes it?

• 0 m

• 0,20 m

• 0,40 m

• 0,80 m

A filament lamp is used in a zoo to keep young animals warm. What are the main types of wave given out by the lamp?

• visible light and infra-red

• visible light and microwaves

• visible light and radio waves

• visible light and X-rays

A loudspeaker vibrates with different amplitudes and at different frequencies. Which amplitude and which frequency produces the louder, higher-pitched sound?

• large amplitude and high frequency

• large amplitude and low frequency

• small amplitude and high frequency

• small amplitude and high frequency

The current in a lamp is 0.25A. The maximum safe current in the cable to the lamp is 5.0A. Which fuse should be used to protect the lamp circuit?

• 0.2A

• 1.0 A

• 5.0 A

• 10.0 A