Question

while the human eye cannot see infrared waves, we feel infrared waves as heat.
a burning fire emits both visible light and infrared waves. when the radiant energy carried by infrared waves strikes an object, it is converted into heat, or thermal energy. so when you warm your hands beside a campfire, the energy carried by infrared waves travels from the fire to your hands and warms them up.
select the true statements.
energy is transferred from the fire to your hands by infrared waves.
a fire gives off both infrared waves and visible light.
thermal energy is converted to radiant energy when infrared waves strike an object.
infrared waves are visible to the human eye.

Explanation:

• The text states "the energy carried by infrared waves travels from the fire to your hands", so "Energy is transferred from the fire to your hands by infrared waves" is true.
• It also says "A burning fire emits both visible light and infrared waves", so "A fire gives off both infrared waves and visible light" is true.
• The text says "When the radiant energy carried by infrared waves strikes an object, it is converted into heat (thermal energy)", not the other way around. So "Thermal energy is converted to radiant energy when infrared waves strike an object" is false.
• The first sentence says "the human eye cannot see infrared waves", so "Infrared waves are visible to the human eye" is false.

Answer:

Energy is transferred from the fire to your hands by infrared waves.
A fire gives off both infrared waves and visible light.