Memory Anchor:

• Super Challenge:

  Stretch:

  Challenge:

Key Questions:

1. (Physics only) What causes a gas to be compressed or expanded?
   • (Physics only) A gas can be compressed or expanded by pressure changes.
2. (Physics only) How does pressure affect gases?
   • (Physics only) Increasing pressure causes gases to compress and decreasing pressure causes them to expand.
3. (Physics only) How does the pressure produce gas being compressed or expanded within a container?
   • (Physics only) The pressure produces a net Force at right angles to the wall of the gas container (or any surface).
4. (Physics only) Using the particle model, how does increasing the volume in which as gas is contained lead to a decrease in pressure?
   • (Physics only) Increasing the volume in which a gas is contained, at constant temperature, can lead to a decrease in pressure through the Particles being more spread out in the larger volume and colliding with the surface of the container less frequently.
5. (Physics only) What does Boyle's Law state?
   • (Physics only) For a fixed mass of gas held at a constant temperature: pressure ? volume = constant p V = constant pressure, p, in pascals, Pa volume, V, in metres cubed, m3
6. (Physics only) How could you calculate the change in pressure of a gas or the volume of a gas (of fixed mass and temperature)
   • (Physics only) pressure1 × volume1 = pressure2 × volume2
7. (Physics only) What is work?
   • (Physics only) Work is the transfer of Energy by a Force.
8. (Physics only) What impact does doing 'work' on a gas have on the internal energy of a gas and temperature?
   • (Physics only) Doing work on a gas increases the internal Energy of the gas and can cause an increase in the temperature of the gas.
9. (Physics only) In a situation like a bicycle pump, explain how doing work on an enclosed gas can lead to an increase in temperature of the gas.
   • (Physics only) Doing work on an enclosed gas leads to an increase in the temperature of the gas by transferring Energy to the gas Particles increasing the kinetic Energy and therefore the temperature.
10. (Physics only) What happens to some of the mass in nuclear fusion?
    • (Physics only) In nuclear fusion some of the mass may be converted into the Energy of radiation.