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A food chain shows how plants and animals get their energy.

Respiration is a chemical reaction that happens in all living cells, including plant cells and animal cells. It is the way that energy is released from glucose.

Digestion is the breaking down of the food we eat into other substances that our bodies can absorb and use.

The proper name for a living thing is a living organism. A living organism can be, amongst other things, a plant or an animal.

Sexual reproduction involves the joining of two sex cells or gametes – the sperm (male gamete) and the egg or ovum (female gamete).

Cigarette smoke contains over 4,000 chemicals, including approximately 69 known cancer causing chemicals as well as over 400 other poisons.

Energy from food keeps a plant or animal alive and allows it to carry out all its activities. Food is very important socially too.

Biodiversity is the variety of all living things on Earth, and how they fit together. It means having as wide a range of different species in an ecosystem as possible.

Blood transports materials and heat around the body and helps to protect against disease.

Green plants and algae can use light energy to make their own food! This process is called photosynthesis.

Most living things need five things to survive but also to be healthy.