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Carbon dioxide is a greenhouse gas that is produced through the burning of fossil fuels such as coal, oil and gas. Increased demands for electricity, heating and cars etc. means that more fossil fuels are...

Focus on the genre of a magazine article - a relevant title aimed at whichever age group you choose to focus on (can be humourous or informative) as well as the page layout expected with an author's name....

Short answer: Dead and/or inactive pathogens. Explanation (also to a further question: "How does this prevent infection later?") : Pathogens are microorganisms...

To begin to solve this question, we need to re-arrange the equations presented so they both appear in terms of 3y=. This will allow us to get a value for y and thus a value for x. First re-arrange the fir...

One way to solve simultaneous equations is to express x in terms of y (or vice versa) and solve your new equation to find one of the values. You can then substitute this into your equation to work out the...