Sievert

High school (ages 12+)
History & Culture

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/sievert

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 a Sievert and why do we use it?The Sievert is a unit that measures the risk of long‑term health problems from invisible radiation, like cancer or genetic damage. It helps scientists and doctors keep everyone safe.
2. How does a Sievert differ from a Gray?A Gray measures how much energy is absorbed, while a Sievert takes that energy and adds how dangerous it is to our bodies. So the Sievert tells us about possible health risks.

Stochastic Health Risk: The probability of an adverse health effect occurring, where the likelihood of the effect increases with dose, but the severity does not.
Absorbed Dose: The physical quantity representing the energy deposited by ionizing radiation per unit mass of material, measured in Grays (Gy).
Equivalent Dose: The absorbed dose in a tissue or organ multiplied by the radiation weighting factor (wR) to account for the biological effectiveness of different radiation types.
Effective Dose: The sum of the equivalent doses to all relevant tissues and organs, each multiplied by its respective tissue weighting factor (wT), representing the overall stochastic risk to the whole body.