Radioactive contamination

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/radioactive-contamination

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. How long is Radioactive contamination?Bikini Atoll, Chernobyl Exclusion Zone, Fukushima Daiichi affected areas
2. What is the primary hazard mechanism?Emission of ionizing radiation from radioactive decay, capable of damaging biological tissues
3. What is the key hazard determinants?Radionuclide type, concentration, radiation energy, and exposure proximity/duration
4. Why is radioactive contamination dangerous?It is dangerous because the radioactive particles decay and release ionizing radiation that can damage DNA, causing cell death or cancer.
5. Where does radioactive contamination come from?It can come from natural sources like uranium in the ground or cosmic rays, and from human activities such as nuclear power plants, waste disposal, or accidents like Chernobyl and Fukushima.

Radionuclide: An atom with an unstable nucleus that spontaneously emits radiation.
Ionizing Radiation: Electromagnetic or particulate radiation that has sufficient energy to ionize atoms or molecules.
Half-life: The time required for half of the radioactive atoms in a sample to decay.
Remediation: The process of cleaning up or restoring a contaminated site to a safe condition.