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==Key Stage 3=====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 be 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|dangerousto 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]].|}