explain how the motion of the molecules in a gas is related both to its temperature and its pressure
application to closed systems only
explain how the motion of the molecules in a gas is related both to its temperature and its pressure
application to closed systems only
explain the relationship between the temperature of a gas and its pressure at constant volume (qualitative only)
recall that gases can be compressed or expanded by pressure changes and that the pressure produces a net force at right angles to any surface
explain how increasing the volume in which a gas is contained, at constant temperature can lead to a decrease in pressure
behaviour regarding particle velocity and collisions
**explain how doing work on a gas can increase its temperature
examples such as a bicycle pump**
describe a simple model of the Earth’s atmosphere and of atmospheric pressure
an assumption of uniform density; knowledge of layers is not expected
explain why atmospheric pressure varies with height above the surface of the planet
describe the factors which influence floating and sinking
explain why pressure in a liquid varies with depth and density and how this leads to an upwards force on a partially submerged object
**calculate the differences in pressure at different depths in a liquid
knowledge that g is the strength of the gravitational field and has a value of 10 N/kg near the Earth’s surface**