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Alive
,→MRS GREN
==Key Stage 1==
===Meaning===
'''Living things''' are things that are alive.
===About Living Things===
'''Living things''' can all [[Growth|grow ]], [[Nutrition|take in food]] and [[water]], move, [[Sense|sense]] changes to the world around them, [[Excrete|get rid of waste]] and [[Reproduce|make new living things]].
===Examples===
===Used in a SentenceBe Careful!===Trees are : Fire is '''not''' a living thingsthing.Flies You can start a fire without another fire but living things always need other living thingsto make them. Also fires can spread and they can go out, but they do not grow.: [[Plant|Plants]] '''can''' move. For example their [[Flower|flowers]] and [[Leaf|leaves]] can turn to face [[The Sun]].Humans are ==Key Stage 2=====Meaning===Anything which can move, respond, [[sense]], [[grow]], [[Reproduction|reproduce]], [[excrete]] and get [[nutrition]] (food) is considered to be a living thingscreature.
: '''[[Adjective]]''': Alive
*'''Reproduce''' - To make copies of itself.
*'''Excrete''' - To get rid of waste products.
*'''Nutrition''' - To take in new materials for growth and repair.
==Key Stage 3==
===Meaning===
[[File:Microbe.png|right|300px|thumb|A [[Cell (Biology)|cell]] is the smallest thing considered to be [[alive]].]]
Something is considered to be '''alive''' if it follows all 7 criteria for living creatures: [[MRS GREN]].
===About being Alive===
: All living creatures are made of tiny parts called [[Cell (Biology)|cell]]s.
: These [[Cell (Biology)|cell]]s follow the criteria of [[MRS GREN]].
===MRS GREN===
: [[MRS GREN]] stands for:
*'''Movement''' - All living creatures can change direction when moving.
*'''Respiration''' - All living creatures can get energy from food.
*'''Sensitivity''' - All living creatures can respond to changes in the environment.
*'''Growth''' - All living creatures can get bigger by taking on new material.
*'''Reproduction''' - All living creatures can make copies of themselves.
*'''Excretion''' - All living creatures can get rid of waste materials.
*'''Nutrition''' - All living creatures can take on new materials for movement, growth and repair.