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Explain what eutrophication is and how it is caused

Some farmers use too many fertilisers, so when heavy rain comes, these can run off the fields. This then pollutes nearby streams and rivers, leading to eutrophication. The process of eutrophication is as fol...
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Answered by Abdullah T. • Biology tutor
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Draw the electronic structure of Sodium Chloride and explain how an ionic bond affects the melting and boiling point.

Ionic bonds are very strong, with elements involved in a compound having a full outer shell of electrons due to donating and accepting electrons, allowing them to be in a very stable state. In this case, Sod...
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Answered by Hans D. • Chemistry tutor
5892 Views

Describe why organisms may become extinct due to a change in the climate

Species like polar bears might go extinct if, for example, sea level rise drastically decreases the size of their territory meaning they have less area to roam, hunt and mate in so they cannot reproduce fast...
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Answered by Lucy E A. • Biology tutor
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What is 90 million in standard form?

1 million = 1,000,00090 million = 90,000,000Place your decimal place after the 9 as standard form only has numbers 1-10 as the first number, otherwise it means this number can be divided by or multiplied 10....
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Answered by Abbie Y. • Maths tutor
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Write 32 X 8^(2x) as a power of 2 in terms of x.

Rules of indices question.32 X 8 2x 32 X (8 2 ) x 32 X (8x8) x 32 X 64 x 32 = 2 5 . and 64 = 2 6 2 5 X (2 6 ) x 2 5 X 2 6x (RULE: x a X x b = x a+b )Answer = 2 (6x + 5)
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Answered by Abbie Y. • Maths tutor
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