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Any chemical that dissociates to give an H⁺ ion is classified as an acid.  There are stong and weak acids but at GCSE you only need to know some key reactions which apply to both weak and st...

All three are types of aural imagery which is probably the most prominent type of imagery as it is easily identified by reading out the text. It is spread into many sections. 

1) Allitera...

The key to a good essay is planning ahead. Firstly look at the question and form the answer by putting down the main points, which will then become your paragraphs. Never put down more...

Suppose you are asked by your teacher to sum all the integers from 1 up to 1000. You might be thinking they must hold some kind of grudge against you. If you try to calculate the sum by adding on each ...

Active immunity is happens due to the contact of lymphocytes with pathoges (or simply their antigens), which triggers the specific immune response and immunological memory is p...