All things on earth can be placed into one of three groups:
Alive - cow, grass, mouse etc.
Used to be alive - wood, fossil, paper etc.
Non-living - stone, glass, metal etc. All living things carry out seven essential processes, and these can be remembered using the acronym MRS. NERG:
M - Movement: Animals move their whole bodies, plants move their leaves and roots R - Reproduction: Animals have babies, new plants grow from seeds S - Sensitivity: Plants and animals both respond to what is happening around them N - Nutrition: Animals eat plants or other animals, plants produce food through photosynthesis E - Excretion: Plants and animals both get rid of waste products R - Respiration: Plants and animals use oxygen to help turn food into energy G - Growth: Babies grow into adults, seedlings grow into bigger plants