AQA GCSE Physics Foundation Tier Paper 1

Figure 1 shows water being heated. Eventually the water changed into steam.

Complete the sentences. Choose answers from the box. Each answer may be used once, more than once or not at all.

Box: greater than, less than, the same as

1. The distance between the particles in steam is __________ the distance between the particles in liquid water.
2. The density of steam is __________ the density of liquid water.

Figure 2 shows how the temperature of the water varied with time.

What is the name of the process that is taking place between points A and B?
Give a reason for your answer.

A mass of 0.063 kg of water was turned into steam.
The specific latent heat of vaporisation of water is 2 260 000 J/kg.
Calculate the thermal energy transferred to the water to turn it into steam.
Use the equation:
thermal energy for a change of state = mass × specific latent heat

The mass of the steam was 0.063 kg.
The volume of the steam was 0.105 m³.
Calculate the density of steam.
Use the equation:
density = mass / volume
Choose the unit from this list: kg, m³/kg, kg/m³

Polonium-210 (²¹⁰₈₄Po) is a radioactive isotope that decays by emitting alpha radiation.
Which is the correct decay equation for polonium-210?
Tick (✔) one box.