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==Key Stage 3=====Meaning===[[File:HarmfulSymbol.png|right|300px|thumb|The symbol for [[harmful]] [[chemical]]s.]]A substance [[harmful]] [[chemical]] is one that can cause some damage to an [[organism]]. ===About Harmful Chemicals===: [[Harmful]] [[chemical]]s can make an [[organism]] ill but will not kill the [[organism]].: Some [[harmful]] [[chemical]]s must be [[ingest]]ed to cause harm, but others may cause harm in contact with the [[skin]] or [[eye]]s. ===Precautions===*[Alive|living[Safety Spectacles]] - To reduce the chance of any getting in the [[eye]]s.*Eye Washing Kit - To quickly remove any which get in the [[eye]]s. ==Key Stage 4=====Meaning===A [[harmful]] [[chemical]] is one that can cause damage to an [[organism]]. ===About Harmful Chemicals===: [[Harmful]] [[chemical]]s can make an [[organism]] ill but will not kill the [[organism]].: Some [[harmful]] [[chemical]]s must be [[ingest]]ed to cause harm, but others may cause harm in contact with the [[skin]] or [[eye]]s. ===Precautions===*[[Safety Spectacles]] - To reduce the chance of any getting in the [[eye]]s.*Eye Washing Kit - To quickly remove any which get in the [[eye]] creaturess.