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This is an example of a 25 mark AQA question. A typical answer would be around two to three pages long, and would thoroughly consider both sides of the argument, while continuing to present a sustained ju...

for this question we must consider the conservation of momentum law which states that the total momentum in a system before a collision must equal the total momentum in a system after a collision where mo...

Some farmers use too many fertilisers, so when heavy rain comes, these can run off the fields. This then pollutes nearby streams and rivers, leading to eutrophication.
The process of eutrophication ...

This question requires you to know the difference between endocrine and exocrine glands, as well as knowing the basic functions of the pancreas.
Endocrine = secretes directly into the blood st...

For differentiation it is known that d/dx(e^x) = e^x always.This example is slightly more complex as it includes a product of x as the power.In this case we can simplify the question by setting 5x= u ther...