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Questions and Answers
What UV index level indicates a high risk of harm from unprotected sun exposure?
When should you reduce time in the sun according to the text?
What is recommended to wear for protection against sun exposure when outdoors?
How often should you apply broad spectrum SPF 30+ sunscreen according to the text?
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At what UV index level should you stay in the shade near midday when the sun is strongest?
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Which type of item helps in reducing exposure to UV rays according to the text?
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What does a UV Index reading of 11 or more indicate?
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What is recommended to be done between 10 a.m. and 4 p.m. to reduce sun exposure?
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What is suggested if one is outdoors during times of high UV Index readings?
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How often should broad spectrum SPF 30+ sunscreen be applied?
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What should be worn to protect against UV radiation on bright surfaces like sand or water?
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At what UV Index reading does the risk of harm become very high from unprotected sun exposure?
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Which type of radiation is emitted by the sun and includes energy in many wavelengths?
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What are examples of biological pollutants found in water?
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What is the role of sunscreen in protecting against UV radiation?
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Why is nonpoint source pollution harder to control compared to point source pollution?
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Which of the following is a way to protect yourself from harmful UV radiation during peak sunlight hours?
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How does the UV index help individuals protect themselves from UV radiation exposure?
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Study Notes
UV Index and Sun Protection
- UV Index reading of 11 or more means extreme risk of harm from unprotected sun exposure.
- UV Index reading of 8-10 means very high risk of harm from unprotected sun exposure.
- UV Index reading of 6-7 means high risk of harm from unprotected sun exposure.
- UV Index reading of 3-5 means moderate risk of harm from unprotected sun exposure.
- UV Index reading of 0-2 means low danger from the sun's UV rays for the average person.
- Bright surfaces like sand, water, and snow reflect UV and increase exposure.
- Reduce time in the sun between 10 a.m. and 4 p.m.
- Seek shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses.
- Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
Water Pollutants
Biological Pollutants
- Viruses: poliomyelitis virus, hepatitis A
- Bacteria: Escherichia coli, Legionella spp, Shigella spp, Vibrio cholera
- Parasites: Entamoeba histolytica, Giardia lamblia
Non-biological Pollutants
- Inorganic chemicals: lead, copper, arsenic
- Industrial solvents: trichloroethylene (TCE)
- Pesticides: dichlorodiphenyltrichloroethane (DDT), atrazine
Radiation
- Radiation is the process in which energy is emitted as particles or waves.
- Sources of natural radiation: extraterrestrial (outer space and the Sun) or terrestrial (radioactive minerals emanating from the Earth).
- The sun is a considerable source of radiation, including visible light, heat, and ultraviolet (UV) radiation.
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Description
Learn about important sun protection tips to reduce the risk of harm from unprotected sun exposure. This quiz covers recommendations such as wearing sunscreen, protective clothing, and seeking shade during peak sun hours.
