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We'll use a variety of exercises to improve your essay techniques.  As well as looking at examples of well written essays, we'll look at your own work to see if you can spot your own areas of weakness ...

Ca plagioclase forms early meaning that it settles down through the magma body and forms in the lower part of the intrusion and solidifies. Na rich plagioclase forms later so is only present in the mid...

Electron affinity is the energy released when 1 mole of gaseous atoms each acquire an electron to form 1 mole of gaseous 1- ions. Fluorine has a negative value as energy is released when the electron i...

Whereas faults have relative movement, joints have no movement. This means that although faults show displacement (such as displaced bedding), joints show no displacement. 

Earthquakes occur when the stored stress in the rock exceeds its strength. Energy is released as the rocks fractures and moves in the form of seismic waves. The energy released causes vibrations creati...