Words to know Write the letter of the definition next to the matching word as you work through the lesson. You may use the glossary to help you.

radiation A. a form of invisible electromagnetic energy that has a longer wavelength than visible light

infrared light B. the transfer of energy through space

thermal energy C. the direct transfer of thermal energy from one substance to another through touching

conduction D. the energy an object has because of the movement wavelength of its particles

Conversation E. a wave that can transfer electric and magnetic convection energy through space

electromagnetic waves F. the distance from the crest of one wave to the crest waves of the next wave

ultraviolet radiation G. the transfer of thermal energy through a liquid or gas radiation H. a measure of how hot or cold something is

greenhouse effect I. a form of invisible electromagnetic energy that has a effect shorter wavelength than visible light

temperature J. the process by which Earth's surface radiates heat into the atmosphere, which radiates some of the heat back to Earth​