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==Key Stage 2==
===Meaning===
'''Evidence''' is the observations and measurements a [[scientist]] gets from an [[investigation]].
: Singular [[Noun]]: '''Evidence'''
: Plural [[Noun]]: '''Evidence'''
===About Evidence===
: There are different kinds of '''evidence''' but scientists don't trust all of them.
: In science '''evidence''' must be [[repeatable]]. If you make an observation or measurement once, you should be able to do it again and again and the [[results]] shouldn't change.
: In science '''evidence''' must be [[reproducible]]. So if one person makes an [[Observe|observation]] or [[Measure|measurement]], every other scientist in the world should be able to make the same [[Observe|observation]]. If they cannot; then scientists don't accept it as good evidence.
===Examples===
{| class="wikitable"
|-
|'''Claim'''
|'''Evidence'''
|-
| style="height:50px; width:200px; text-align:center;" | Plants need water to live.
| style="height:50px; width:200px; text-align:center;" | Plants in dry soil wilt and then die.
|-
| style="height:50px; width:200px; text-align:center;" | Paper is flammable.
| style="height:50px; width:200px; text-align:center;" | When you place a flame under paper the paper catches fire.
|-
| style="height:50px; width:200px; text-align:center;" | Cats are mammals.
| style="height:50px; width:200px; text-align:center;" | They have fur, they give birth to live babies, they feed their babies with milk.
|}
==Key Stage 3==
===Meaning===
[[Evidence]] is the [[observation]]s, [[Reading|readings]] or [[Measure|measurements]] that a [[scientist]] will use to test whether a [[hypothesis]] is correct.
===About Evidence===
: There are different kinds of [[evidence]] but scientists don't trust all of them.
: In science [[evidence]] must be [[repeatable]]. If you make an [[observation]] or [[measure]]ment once, you should be able to do it again and again and the [[results]] shouldn't change.
: In science [[evidence]] must be [[reproducible]]. So if one person makes an [[Observe|observation]] or [[Measure|measurement]], every other scientist in the world should be able to make the same [[Observe|observation]]. If they cannot; then scientists don't accept it as good [[evidence]].
: Stories, or [[observe|observations]] made by non-scientists, that cannot be [[repeatable|repeated]] are called [[Anecdotal Evidence|anecdotal evidence]] which is not accepted by scientists because people could have made a mistake or be lying.
===Examples===
The Earth is Round:
Observation - The tip of a mast always appears before the rest of the ship on an ocean.
Measurements - On the 23rd of June a stick at the equator has no shadow. In Alexandria the shadow is 3cm long, in Paris it is 5cm long and in London the shadow is 8cm long.
==Key Stage 4==
===Meaning===