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GCSE Chemistry · key term
Contact between a substance and a person, another organism or the environment.
Used by OCR
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Risks of nanoparticlesExposure therefore matters: a potentially harmful particle cannot affect a person or the environment unless contact occurs.
In an evaluation, consider the particular material, purpose and likely exposure. Do not make one judgement about all nanoparticles.
Do not confuse hazard with risk: a material can have the potential to cause harm but present a low risk when exposure is limited.
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