What does gas weigh? An experiment using fizzy lemonade to determine mass.
Joseph Priestley describes his work and his discovery of carbon dioxide and oxygen.
A look at a range of day-to-day examples of separating liquids and solids.
A compilation of clips based on a theme of liquids and solids.
A compilation of clips based on the theme of solids, liquids and gases.
Gas produced underwater by pondweed is collected in a test tube and shown to be oxygen.
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