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In his preface to the 1800 edition of Lyrical Ballads, with Other Poems, William Wordsworth says of “We are Seven” that it evinces ‘the perplexity and obscurity which in childhood attend our noti...

Erosion, weathering, transportation and deposition.

Both core and comparative texts may be used throughout your course of study. Though it may seem that the differences are few and possibly inconsequential they are there for a reason.

Core texts are...

The general formula for when a acid reacts with a salt (sodium) is that a salt and hydrogen is produced. This should be learnt off by heart!

So, our acid is Hydrochloric acid, and when this reacts ...

So before we understand this we need to quickly explain homeostasis. This is essentially the process by which the body maintains a constant internal environment. Our external environment changes all the t...