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For a hydrocarbon (oil or gas) accumulation to form a source rock, reservoir rock and cap/seal rock are required. A trapping mechanism is also essential and this can be structural or stratigraphic. A sour...

Both tenses refer to actions in the past. The preterite is used to describe actions in the past that have been completed. Exampe: Fuí al baile anoche- I went to the dance last night. The verb ir is in the...

As with writing a letter in English, it is important to adopt the correct register and tone for the person you are writing to. To open your letter, use one of the following options picking the best one th...

The best way to prepare for your Oxbridge Economics interview is to be on top of all your A-level mathematics knowledge and to practise solving maths problems. I recommend trying the UKMT Senior papers fo...

Recall the trigonometry rule SOH/CAH/TOA (Silly Old Hitler Couldn't Advance His Troops Over Africa).

1. Label:   Draw the triangle and label the sides with Hyp, Opp & Adj.
   
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