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Species change over time by a process called natural selection. This is commonly associated with Darwin, as he wrote about it in his book "On the origin of species". Evolution (the change of a s...

Question = Simplify a⁴ x a⁵-------------------------------------------So here we have two 'groups' of a being multiplied together. We can rewrite a⁴ and a⁵ as t...

Eutrophication occurs when mineral ions from the soil such as nitrates are leached (washed away by the rain) and they run into rivers, lakes and ponds. This increase in nutrients into the water causes an ...

Essentially that objects have a top speed falling through air to the ground, which is called terminal velocity. This is because we are surrounded by air, so when moving, objects have to push past the air ...