Exam-style question
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What is the primary source of background radiation in most environments?.
- A.Medical X-rays
- B.Radon gas from the ground
- C.Nuclear power plants
- D.Cosmic rays from space
Model answer
What a good answer should say
- Radon gas from the ground
Explanation
Why this works
The evidence shows that radon gas, which emanates from the decay of uranium in the soil, is a significant contributor to background radiation levels in many areas. This implies that radon is a common and often overlooked source of radiation exposure.
Therefore, the conclusion is that radon gas from the ground is the primary source of background radiation in most environments.
Common mistake
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