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Explain the process of eutrophication.

Leaching from the excessive use of fertilisers causes a nutrient build up in neighbouring rivers or lakes. As a result of the increased nutrients plants within the lake or river grow rapidly, including algae...
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Answered by Ellen C. • Biology tutor
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What are the main parts of the digestive system, and how are they involved in digestion?

The main parts of the digestive system are the... - mouth - oesophagus - stomach - liver - gall bladder - pancreas - small intestine - large intestine There are three main enzymes involved in digestion: Amyl...
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Answered by Heather D. • Biology tutor
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Why can ammonium sulfate be described as a salt?

A salt is an ionic compound which is made up of two groups of oppositely charged ions. The overall compound of a salt compound must have an overall electrical charge of 0. Ammonium sulfate, (NH4)2SO4, can be...
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Answered by Chloe R. • Chemistry tutor
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What are the main forms of river erosion?

Definition : River erosion is a process through which the riverbed, banks and rocks are worn away. There are 4 key types of river erosion: 1. Attrition This occurs as smaller rocks which are carried along by...
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Answered by Chloe R. • Geography tutor
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How would I solve x^2 + 7x + 10 = 0

The first step of solving this equation to find out what x is, is to factorise it. This means grouping it into a set of double brackets which will take the form (x+a)(x+b)=0. The a and the b must give the co...
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Answered by Will N. • Maths tutor
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