Ionizing radiation

High school (ages 12+)
Science & Technology

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/ionizing-radiation

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 ionization energy threshold?The minimum energy required for ionization typically starts around 10 electronvolts (eV)
2. What is the key anthropogenic sources?Medical imaging devices (X-ray tubes), particle accelerators, and nuclear fission processes
3. Where does ionizing radiation come from naturally?Natural sources include radioactive decay of unstable atoms and cosmic rays from space that hit the Earth's atmosphere, producing secondary particles and radioisotopes like carbon‑14.
4. How is ionizing radiation used in medicine?In medicine, X‑rays and CT scans use ionizing radiation to take pictures inside the body, and radiotherapy uses controlled doses to kill cancer cells.

Ionizing Radiation: Radiation with enough energy to remove electrons from atoms and molecules, creating ions.
Electromagnetic Spectrum: The full range of electromagnetic radiation, including gamma rays, X-rays, UV, visible light, and radio waves.
Radioactive Decay: The spontaneous process by which an unstable atomic nucleus transforms into a more stable one, emitting particles or energy.
Cosmic Rays: High-energy particles originating from outer space that bombard Earth's atmosphere.