1.32 understand gravitational field strength, g, and recall that it is different on other planets and the moon from that on the Earth

Gravitational field strength (g) is how strongly something pulls an object towards it. 

On Earth it is 9.8 (rounded to 10)

Earth has a higher gravitational field strength than the moon. This is because they have different masses, the Earth has more mass than the moon, therefore the Earth has a bigger gravitational field strength than the moon - the bigger the planet/object (as comets and stars can have g too) the bigger the gravitational field strength.