1. Radiation and Life P2
Revision mind map

3. photons radio Low frequency CFC’s microwave ozone infrared
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
ALARA
principal
Precautionary
principal
decompose

4. 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
Ionising
radiation
Major greenhouse gases include:
Carbon dioxide, methane and water
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

5. Explain what is happening in each of the pictures below

6. Explain the pictures below
Ionising
radiation

7. Carbon Cycle

8. Explain
Ionising
radiation

9. Mobile phones: what is the risk?
Watch youtube video: cancer and cell phone EMR EMF radiation in children.