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===Meaning===
A [[hazard]] is something that could be dangerous.
===About Hazards===
: Something which is '''hazardous''' may be unsafe if used incorrectly.
: When dealing with '''hazards''' the danger can be reduced by taking '''precautions'''.
===Examples===
{| class="wikitable"
| style="height:20px; width:150px; text-align:center;" |'''Toxic'''
| style="height:20px; width:150px; text-align:center;" |'''Flammable'''
| style="height:20px; width:150px; text-align:center;" |'''Harmful'''
| style="height:20px; width:150px; text-align:center;" |'''Irritant'''
|-
|[[File:ToxicSymbol.png|center|150px]]
|[[File:FlammableSymbol.png|center|150px]]
|[[File:HarmfulSymbol.png|center|150px]]
|[[File:IrritantSymbol.png|center|150px]]
|-
| style="height:20px; width:150px; text-align:center;" |A [[toxic]] [[substance]] is one that is so poisonous it could kill a [[human]].
| style="height:20px; width:150px; text-align:center;" |A [[flammable]] [[substance]] is one that can catch on fire easily.
| style="height:20px; width:150px; text-align:center;" |A [[harmful]] [[chemical]] is one that can cause damage to an [[organism]].
| style="height:20px; width:150px; text-align:center;" |An [[irritant]] is a substance that can cause itching and pain to the [[skin]], [[eyes]] or [[lung]]s
|-
| style="height:20px; width:150px; text-align:center;" |'''Corrosive'''
| style="height:20px; width:150px; text-align:center;" |'''Long Term Health Risk'''
| style="height:20px; width:150px; text-align:center;" |'''Dangerous to the Environment'''
| style="height:20px; width:150px; text-align:center;" |'''Explosive'''
|-
|[[File:CorrosiveSymbol.png|center|150px]]
|[[File:LongTermHealthRiskSymbol.png|center|150px]]
|[[File:DangerousToTheEnvironmentSymbol.png|center|150px]]
|[[File:ExplosiveSymbol.png|center|150px]]
|-
| style="height:20px; width:150px; text-align:center;" |A [[corrosive]] substance is one which can break down other [[material]]s or damage the [[skin]].
| style="height:20px; width:150px; text-align:center;" |[[Chemical]]s that are a [[Long Term Health Risk|long term health risk]] cause [[Non-communicable Disease|non-communicable diseases]] if they are used repeatedly over long periods of time.
| style="height:20px; width:150px; text-align:center;" |A [[chemical]] that is [[Dangerous to the Environment|dangerous to the environment]] can kill [[organism]]s other than [[human]]s.
| style="height:20px; width:150px; text-align:center;" |An [[explosive]] substance is one which can [[Chemical Reaction|react]] very quickly, without needing [[oxygen]] from the [[air]], that produces a lot of [[gas]] during the [[Chemical Reaction|reaction]].
|-
| style="height:20px; width:150px; text-align:center;" |'''Oxidising Agent'''
| style="height:20px; width:150px; text-align:center;" |'''Compressed Gas'''
| style="height:20px; width:150px; text-align:center;" |'''Biohazard'''
| style="height:20px; width:150px; text-align:center;" |'''Ionising Radiation'''
|-
|[[File:OxidisingAgentSymbol.png|center|150px]]
|[[File:CompressedGasSymbol.png|center|150px]]
|[[File:BiohazardSymbol.png|center|150px]]
|[[File:IonisingRadiationSymbol.png|center|150px]]
|-
| style="height:20px; width:150px; text-align:center;" |An [[Oxidising Agent|oxidising agent]] is a [[chemical]] that causes the [[oxidation]] of other [[chemical]]s.
| style="height:20px; width:150px; text-align:center;" |[[Compressed Gas]] is when a [[gas]] is held under high [[pressure]] in a container.
| style="height:20px; width:150px; text-align:center;" |A [[biohazard]] is something which contains [[pathogen]]s which could cause [[disease]].
| style="height:20px; width:150px; text-align:center;" |[[Ionising Radiation]] is [[radiation]] which can cause [[atom]]s to lose [[electron]]s and become [[ion]]s.
|-
| style="height:20px; width:150px; text-align:center;" |'''Danger of Electrocution'''
| style="height:20px; width:150px; text-align:center;" |'''LASER Radiation'''
|-
|[[File:ElectrocutionSymbol.png|center|150px]]
|[[File:LASERSymbol.png|center|150px]]
|-
| style="height:20px; width:150px; text-align:center;" |A [[Danger of Electrocution|danger of electrocution]] is when there is [[electricity]] at such a large [[Potential Difference|potential difference]] that it could pass through a living [[organism]].
| style="height:20px; width:150px; text-align:center;" |[[LASER Radiation]] is an extremely [[intensity|intense]] beam of [[light]].
|}
==Key Stage 4==
===Meaning===
A [[hazard]] is something that could cause harm to living [[organism]]s.
===About Hazards===