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总计：5300

Demonstrating convective heat transfer with coloured water

A paper snake above a radiator demonstrates the rising of hot air

Boiling: the rapid vaporisation of a liquid

Steam condenses on the cold glass

Making greeting cards for Mother's Day

Clothing factory

Creating cutout paper marionette

Making lilac flowers from crepe paper

Making a flower supporting structure from skewers

Decorating eggs

Creating a hand from plaster

Sunflower oil production

Telecommunication

Distillation

Water pollution is harmful for the environment

Aeration of an aquarium

Fish die without oxygen dissolved in water.

The solutions of detergents are excellent wetting agents for oils

Grease is soluble in petrol

Sugar dissolves in tea

Snowflakes are made of ice crystals

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