Science Project Ideas

Warm and Cold: Expanding Air

As air gets warm, the air molecules have more energy and move around more, taking up more space. As the warm air expands, it becomes less dense (see ‘Floating and…

Making an Emulsion

Oil and water are described as immiscible liquids – liquids that do stay mixed together (see ‘Why Oil and Water Don’t Mix’). Even if oil and water are thoroughly shaken…

Action and Reaction: Balloons in Flight

Sir Isaac Newton was born in 1643 and died in 1727. He was a physicist, mathematician, astronomer, biologist and chemist. Newton developed three laws of motion, which described how things…

Make a Soda Fountain

Drinks are fizzy because they have carbon dioxide in them – the gas is forced into the drink at low temperatures and dissolves. Homemade fizzy drinks can be made using…

Pulling and Pushing: Magnetic Attraction

Magnets are attracted to some metals, and can attract and repel each other. The earth has a magnetic field, and so magnets can be used to find directions. Magnets and…

Invisible Ink

Invisible ink, sometimes called ‘sympathetic ink’, is a way of writing secret messages. Spies have used invisible inks to pass on secret messages, as have prisoners and hostages. Invisible Messages…

Friction: Keeping Warm and Keeping Rolling

Friction is the force that acts between two moving surfaces and tries to stop them moving. Friction can be between two solids, a solid and a liquid, or a solid…

Soap and Detergent Chemistry

Soap is made from animal fats and vegetable oils, mixed with a caustic chemical called sodium hydroxide (also known as lye). The sodium hydroxide reacts with the oil to make…

Floating and Sinking: Looking at Density

Density describes how much something weighs relating to its size. For example, a cubic centimetre of cork weighs less (is less dense) than a cubic centimetre of lead (which is…

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