Question

adon: a colorless, odorless, ______

• it is made and released ____ when ____

and water ______.

• it can ______ and build up inside

basements and homes with poor air circulation.

• this map shows us regions that, due to their geology, have low,

moderate, and high levels of radon risk.

Explanation:

To fill in the blanks about radon, we use knowledge from Environmental Sciences (a subfield of Natural Science) about radon's properties and behavior:

First blank (description of radon):

Radon is a colorless, odorless, radioactive gas (it’s a radioactive noble gas, naturally occurring).

Second and related blanks (formation/release):

It is made and released naturally when uranium (a radioactive element in soil/rock) and water interact (or “break down”/“decay”—uranium in soil, rock, or water decays, producing radon).

Third blank (movement):

It can seep into buildings (or “enter homes,” “permeate structures”) and build up inside basements and homes with poor air circulation (radon moves from soil/rock into enclosed spaces).

If you need specific phrasing or have more context, let me know! For example, the most precise scientific answers would be:

• First blank: radioactive gas
• Formation: naturally; uranium in soil, rock, or water; decay (or “break down”)
• Movement: seep into buildings (or “enter homes”)

(Note: The problem involves environmental science/geology concepts about radon, a radioactive gas from natural uranium decay, which accumulates in poorly ventilated spaces.)

Answer:

To fill in the blanks about radon, we use knowledge from Environmental Sciences (a subfield of Natural Science) about radon's properties and behavior:

First blank (description of radon):

Radon is a colorless, odorless, radioactive gas (it’s a radioactive noble gas, naturally occurring).

Second and related blanks (formation/release):

It is made and released naturally when uranium (a radioactive element in soil/rock) and water interact (or “break down”/“decay”—uranium in soil, rock, or water decays, producing radon).

Third blank (movement):

It can seep into buildings (or “enter homes,” “permeate structures”) and build up inside basements and homes with poor air circulation (radon moves from soil/rock into enclosed spaces).

If you need specific phrasing or have more context, let me know! For example, the most precise scientific answers would be:

• First blank: radioactive gas
• Formation: naturally; uranium in soil, rock, or water; decay (or “break down”)
• Movement: seep into buildings (or “enter homes”)

(Note: The problem involves environmental science/geology concepts about radon, a radioactive gas from natural uranium decay, which accumulates in poorly ventilated spaces.)