investigate, to find out something by doing experiments and making observations, variable, a factor that can change and affect the result of an experiment, equipment, tools and materials used to carry out an experiment, burette, a long glass tube used to measure and add precise amounts of liquid in experiments, filtrate, the liquid that passes through a filter during filtration, filter, to separate a solid from a liquid using filter paper, solution, a liquid mixture formed when a substance dissolves in a liquid, indicator, a substance that changes colour to show whether a solution is acidic, neutral, or alkaline, remedy, a treatment used to relieve a health problem, cloudy, when a liquid becomes unclear because a solid forms in it, precipitate, a solid that forms in a liquid during a chemical reaction, glowing, giving out light without a flame, showing energy is released, digest, to break down food in the body so it can be absorbed, indigestion, stomach discomfort caused by too much acid in the stomach, result, what is observed or measured in an experiment, measure, to find the amount or quantity of something using equipment, pH, a scale used to measure how acidic, neutral, or alkaline a solution is, sample, a small amount of a substance used for testing, fizzing, bubbling caused by gas being produced, prediction, what you think will happen before doing an experiment.

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