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Why do volcanoes and earthquakes occur at destructive plate margins?

Destructive plate margins are where a plate of higher density is subducted, or forced underneath, another, less dense plate. This occurs due to convection currents in the mantle. These are caused by radioact...
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Answered by Laura S. • Geography tutor
42369 Views

Outline the differences between the three different types of rock.

Igneous rocks Igneous rocks are distinguishable by the fact that they are made up of crystals, which vary in size depending on where the rock was fomed. Intrusive rocks consist of larger crystals - formed in...
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Answered by Laura S. • Geography tutor
18447 Views

How do I ask a question in French?

There are three ways of turning a statement into a question in French. They are all equally good, but are perhaps used in slightly different situations, as I will explain. The first (and easiest) way is simp...
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Answered by Isabel K. • French tutor
4630 Views

What is Reverse Polish Notation?

Reverse Polish Notation (or RPN) is simply a different mathematical way of laying out equations, take for example the expression: 7+ 9 The layout is <First number> <Operator> <Second Number&gt...
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Answered by Nick P. • Computing tutor
5806 Views

How are blood glucose levels regulated in humans?

Blood glucose homeostasis involves maintaining the levels of blood glucose within a very narrow limit around a set point (90mg 100cm-3). This is done via hormonal regulation. On one hand, insulin which is a ...
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Answered by Christie M. • Biology tutor
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