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When analysing primary sources, it is important to consider 3 main things (i) who is writing the source? (ii) what can you infer from the source? (iii) How does this match up to the knowledge you have on ...

ATP binds to the myosin head   Hydrolysis of ATP causes the head to come to a “cocked” position. Then the head binds to the actin binding site creating a cross-bridge ADP and Pi are released from the myos...

A reflex arc is a system of sensory, motor and relay neurones that work together to provide a quick reaction to stimulus that protects us from danger. A really good example that often comes up in t...

A meander is a bend in a flowing body of water. The physical processes which form menders are erosion and deposition. Erosion occurs mainly on the outside bend as the water is faster, deeper and has a gre...

In both an elastic and inelastic collision momentum is conserved, however in an elastic collision the total kinetic energy is the same before and after the collision. In an inelastic collision kinetic ene...