Ultraviolet index

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/ultraviolet-index

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the measurement basis?Erythemally weighted UV irradiance
2. What is the development year?1992
3. What is the UV Index and why is it important?The UV Index is a number that tells how strong the sun's invisible rays are. It helps us know when to wear sunscreen or find shade to protect our skin and eyes.
4. How was the UV Index created?Canadian scientists invented it in 1992 to give people an easy way to understand sun‑ray danger. In 1994 the WHO and WMO made it a worldwide standard.

Ultraviolet (UV) Radiation: Electromagnetic radiation with wavelengths shorter than visible light, categorized into UV-A, UV-B, and UV-C.
Erythemal Action Spectrum: A measure of the relative effectiveness of different UV wavelengths in causing skin redness (erythema).
UV Irradiance: The power of UV radiation per unit area, typically measured in watts per square meter.
Public Health: The science and art of preventing disease, prolonging life, and promoting health through organized efforts and informed choices.