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The temperature of the surrounding is decreased because energy is taken into the reaction. An example of this is two solutions A and B being mixed and the resultant product mixture having lower temperature.

These can seem a bit intimidating at first, but no need to panic over them! Firstly, look at the question and highlgiht the key terms. Identify exacltly what it is asking you to do (explain? describe? evalua...

Aerobic respiration is respiration that uses oxygen and glucose, whilst anaerobic respiration is respiration that only uses glucose. As you can see in the equations for both types of respiration: Aerobic res...

A neat trick to remember what we do to the powers when integrating and differentiating is that we IN crease the power when we IN tegrate, and D ecrease the power when we D ifferentiate! Once we've got the po...

I always think of the middle number as the sum and the last number as the product (in this example, we have the sum as 5 and the product as 6!) This just means that we have to look for two numbers which add ...