These words ask for more than a fact. They want the working, the argument or the pattern — so show the examiner how you got there.
Question: Explain why some areas receive more rainfall than others.
One reason why some areas receive more rainfall is relief. As moist air is forced to rise over mountains it cools, condenses and forms rain. For example, the mountainous Lake District receives over 3000 mm of rain each year. Therefore, relief is an important factor affecting rainfall.
The data shows that Location A receives more rainfall than Location B in most months. The difference is greatest in winter, when A receives around 120 mm compared with 70 mm at B. This suggests A has a wetter climate overall.
One argument is that wind and solar produce no carbon dioxide while generating electricity. However, they are expensive to build and some depend on the weather. Overall, renewables matter, but work best alongside other strategies.
First, subtract the original population from the new one. Then divide the increase by the original and multiply by 100. A rise from 20,000 to 25,000 is an increase of 5,000. Therefore, the percentage increase is 25%.