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Radiation and Life P2

Radiation and Life P2. Revision mind map. photons. radio. CFC’s. Low frequency. Protects us from harmful UV. microwave. ozone. infrared. Electromagnetic spectrum. Trapped radiation . visible. reflected radiation . ultraviolet. Water vapour. Ionising radiation Damages cells.

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Radiation and Life P2

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  1. Radiation and LifeP2 Revision mind map

  2. photons radio CFC’s Low frequency Protects us from harmful UV microwave ozone infrared Electromagnetic spectrum Trapped radiation visible reflected radiation ultraviolet Water vapour Ionising radiation Damages cells Carbon dioxide X-ray high frequency gamma methane Greenhouse effect Time exposure Intensity (strength) Carbon cycle respiration respiration CO2 photosynthesis Benefit / Risk Hydrocarbons fossil fuels decompose ALARA principal Precautionary principal

  3. Radiation from the sun Photons CFC’s found in fridges and aerosols deplete the ozone layer . Ozone protects all living things from harmful UV. Electromagnetic spectrum Radio Microwave Infrared Visible Ultraviolet X-ray gamma Low frequency / energy Ozone (O3) absorbs UV Global warming: Too much gases in the atmosphere absorb and trap (green house effect) the radiation. high frequency / energy Major greenhouse gases include: Carbon dioxide, methane and water Ionising radiation To balance benefit / risk consider: exposure time, intensity and a shield that will absorb radiation i.e. lead, sunblock, etc. High doses kill cells. Smaller doses damage cells. Damaging the DNA can result in cancers. • The carbon cycle is a balanced system. • Photosynthesis (removes) • Respiration (releases) • Burning fossil fuels (releases) • Death / excretion (releases) Precautionary principal (better safe than sorry!) ALARA principal As Low As Reasonably Acceptable Imbalance of the cycle can cause climate change: burning / deforestation

  4. Explain what is happening in each of the pictures below A B

  5. Explain the pictures below A B Ionising radiation

  6. Carbon Cycle

  7. Explain Ionising radiation

  8. Mobile phones: what is the risk?

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