Leasing License Practice Exam

Which condition can affect radon concentration levels in a home?

1. Seasonal climate changes

2. Type of plumbing used

3. Age of the property

4. Interior humidity levels

The correct answer is: Seasonal climate changes

Seasonal climate changes significantly influence radon concentration levels in a home. Radon, a naturally occurring radioactive gas, is produced from the decay of uranium in soil and rock. Its concentration can vary based on temperature differences and atmospheric pressure changes throughout different seasons. For instance, during colder months when homes are typically sealed more tightly to conserve heat, radon levels can increase due to reduced ventilation. Conversely, during warmer months, increased airflow and the opening of windows can help dilute radon levels, leading to lower concentrations. Other factors, while potentially relevant to home conditions, have less direct correlation to radon levels. The type of plumbing may affect other aspects of home safety or functionality but does not directly influence the presence of radon. Similarly, the age of the property may relate to construction methods or materials but does not inherently determine radon levels. Interior humidity levels can impact air quality but are also not a primary factor affecting radon concentrations, which are more closely linked to geological and environmental factors than indoor climate conditions.