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As water flows over underlying rocks, it erodes softer rock much faster than harder rock. This creates a small step in the stream or river. Explaining the formation of waterfalls As water flows over underlyi...

If you don't know it, don't include it. The examiner will not be impressed with your ability to memorise a date down to the exact day/month/year, but will instead award marks for you ability in showing how t...

Historiography is simply the study of history itself. It's about looking at how historians have developed their ideas over time and what tools they have had at their disposal to best form an argument. Unlike...

So x 2 + 9x + 20 = 0 My preffered way of solving this equation is to factorise the equation. (Though I understand that different students may find other ways easier) Factorisation is where the above equation...

Let's draw a line. It crosses the point (0,1), intercepting the y-axis (remember, y to the sky!) at 1 and the x-axis at the point (-2,0). An equation tells us what a line looks like, it's a way of describing...