Radiation and Life P2 Revision mind map
photons
radio microwave
Electromagnetic spectrum reflected
visible
X-ray gamma
Water vapour
Carbon dioxide high frequency
methane
Intensity Greenhouse effect Carbon cycle (strength)
Time exposure fit e n e B
Trapped radiation
radiation
ultraviolet
ALARA principal
Protects us from harmful UV
ozone
infrared
Ionising radiation Damages cells
CFC’s
Low frequency
sk i /R
Precautionary principal
CO2
respiration
respiration
photosynthesis
Hydrocarbons fossil fuels
decompose
Radiation from the sun
Photons
Electromagnetic spectrum Radio Microwave Infrared Visible Ultraviolet X-ray gamma Ionising radiation
Low frequency / energy
CFC’s found in fridges and aerosols deplete the ozone layer . Ozone protects all living things from harmful UV. Ozone (O3) absorbs UV
high frequency / energy
To balance benefit / risk consider: exposure time, intensity and a shield that will absorb radiation i.e. lead, sunblock, etc.
Global warming: Too much gases in the atmosphere absorb and trap (green house effect) the radiation. Major greenhouse gases include: Carbon dioxide, methane and water
High doses kill The carbon cycle is a balanced system. cells. Smaller •Photosynthesis (removes) doses •Respiration (releases) damage cells. •Burning fossil fuels (releases) Damaging the •Death / excretion (releases) DNA can result Precautionary ALARA principal in cancers. Imbalance of the cycle can principal (better As Low As Reasonably cause climate change: safe than sorry!) Acceptable burning / deforestation
Explain what is happening in each of the pictures below A
B
Explain the pictures below A
B
Ionising radiation
Carbon Cycle
Explain
Ionising radiation
Mobile phones: what is the risk?