Question

read the text. then answer the question.

the gases that make up the atmosphere interact with certain forms of radiation. radiation is a type of energy. radiation is all around us in the form of sunlight, microwaves, radio waves, and more. in fact, most matter gives off some form of radiation.
we can see some radiation, but most radiation is invisible. for example, the fireplace shown here is giving off visible radiation in the form of light we can see. it is also giving off invisible radiation, called infrared radiation. the person sitting nearby cannot see the infrared radiation but can feel it as heat.

based on the information above, which of the following is true? select all that apply.
only bright objects give off radiation.
the sun releases radiation.
infrared radiation can sometimes be felt as heat.
most forms of radiation can be seen with the naked eye.

Explanation:

1. The text states "most matter gives off some form of radiation", so the claim that only bright objects do is false.
2. The text lists sunlight as a form of radiation, so the sun releases radiation is true.
3. The text notes that infrared radiation from a fireplace is felt as heat, so this statement is true.
4. The text says "most radiation is invisible", so the claim that most can be seen is false.

Answer:

• The sun releases radiation.
• Infrared radiation can sometimes be felt as heat.