Science

 Science / Scientists

Science is about finding out. It helps us make sense of our world. Science begins with observation. This means looking at things very carefully. Scientists work in different ways and study many subjects, such as biology, astronomy, medicine, geology and chemistry. Much has been discovered through science, but there is a lot to find out about our world. Scientists see things happening and start to ask complex questions. Sometimes they guess at possible answers. Then they carry out experiments, or tests, to see if they were right. When scientists carry out experiments they measure and record what is happening. They might do the same test several times. The results are often worked out with computers. Time is very important to scientists. They often need to measure exactly how long it takes something to happen. Over thousands of years, people have invented different clocks. Candles, shadows and sand have been used to measure the passing of hours and minutes. Today, scientists can measure in seconds and even tiny parts of a second, so their results can be extremely accurate.