Key learning points

1. Yeast is a type of fungus and can be grouped with other fungi including mould, mushrooms and truffles.
2. Yeast is living and must get food from the surrounding environment to grow and reproduce.
3. Yeast takes in nutrition from food and produces carbon dioxide gas.
4. Yeast is a useful micro-organism used in beer and wine making, and baking.
5. Scientists control variables during comparative test investigations to see the effect of changing one variable.

Keywords

• Fungi - Fungi are organisms that include moulds, mushrooms, and yeasts. They feed on organic matter, usually from dead things.

• Yeast - Yeast is a type of fungus. It is a micro-organism used for making bread.

• Carbon dioxide - Carbon dioxide is a type of gas.

• Comparative test - In a comparative test, the thing that is being changed has labels, such as the types of materials.

• Variables - A variable is something that can be changed, measured or kept the same in an investigation.

Common misconception