1Our school held its science fair in the gym last Friday.
2Each student had to design an experiment with a clear question.
3Mark tested which type of soil helped beans grow fastest.
4He kept all the seeds in the same light and temperature.
5Only the soil was different, so the test stayed fair.
6Anna built a small volcano using baking soda and vinegar.
7The mixture fizzed because the reaction produced a gas.
8She explained that real volcanoes erupt for a different reason.
9One group measured how quickly ice melts on different surfaces.
10The ice on the dark metal melted faster than the ice on wood.
11Dark surfaces absorb more heat from their surroundings.
12Another student showed how plants bend toward a window.
13This behaviour is called growing toward the light.
14The judges asked everyone to explain their results clearly.
15A good scientist writes down everything, even the failures.
16Mark's beans grew best in the soil mixed with compost.
17He admitted that two of his pots had not grown at all.
18Repeating an experiment helps you check your first results.
19Anna's volcano won the prize for the clearest explanation.
20The fair ended with applause and a table full of certificates.