I know that if you push and pull with the same force then the forces are balanced.

I can tell what will happen when you push and pull with different sized forces.

I know big forces cause big changes and little forces little changes.

I can use arrows to show the size of forces.

I know that gravity is a pull.

I know that longer ‘spanners’ make jobs easier.

I can show you streamlined objects.

I know that skis, snow shoes and wide tyres ‘spread the load’.

I know that points and edges concentrate the force.

I know that arms and legs work like levers.

I can describe how to balance a see-saw using equal weights.

I can describe pressure in terms of how a force is spread over an area.

I can explain how making the lever arm longer makes a spanner easier to turn.

I can make a see-saw balance using unequal weights.

I can predict where to put the weights on a see-saw.

I can use the equation pressure = force/area.

I can explain how pressure is caused in fluids and gases in terms of particles.

I can explain how the pressure in a tyre can be increased by putting in more molecules.

I can calculate turning moments.

I can explain real examples of the use of levers.

Level 7

I can explain why fluid pressure increased with depth.

I can explain the difference between force and pressure.

I can carry out more complex calculations of pressure.

I can use my knowledge of moments to explain complex uses of levers.