Section 4: Mass, Weight, Density (5059 PHYSICS GCE ORDINARY LEVEL (2014))

(a)  state that mass is a measure of the amount of substance in a body 

(b) state that mass of a body resists a change in the state of rest or motion of the body (inertia) 

http://www.physicsclassroom.com/class/newtlaws/Lesson-1/Inertia-and-Mass

(c) state that a gravitational field is a region in which a mass experiences a force due to gravitational 
attraction 

(d) define gravitational field strength, g, as gravitational force per unit mass 

(e) recall and apply the relationship weight = mass × gravitational field strength to new situations or to 
solve related problems 

http://www.gcse.com/eb/gtest.htm

(f) distinguish between mass and weight

http://www.bbc.co.uk/bitesize/ks3/science/energy_electricity_forces/forces/revision/3/

(g) recall and apply the relationship density = mass / volume to new situations or to solve related 
problems

http://www.bbc.co.uk/bitesize/higher/physics/mech_matt/pressure/revision/1/

http://hyperphysics.phy-astr.gsu.edu/hbase/dens.html