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Today in science, we thought carefully about how to conduct an experiment. First, we considered what makes something an experiment, and learnt that it is to test something, record what happens, and use your observations to answer a question. We followed careful instructions to set up our own practical experiment by investigating whether cornflour and water make a solid or a liquid. We realised that the mixture could both be a solid and a liquid. This was because it is a ‘non-Newtonian liquid’ which means that the same material may appear more thick or runny in different situations – depending on the force or pressure applied to it.