The Sun as an Energy Source

Hot Notes• Radiation is the direct

transfer of energy by electromagnetic waves

• Solar radiation is energy from the Sun

• It is a major source of energy on Earth.

What is a Radiometer?

An indicator of radiant energy.

Collecting Radiant Energy DataDistance vs. Time

Distance From the Lightbulb to radiometer

Time(Number of Seconds Radiometer Continues to

Spin after Lights Out)Trial 1 Trial 2 Trial 3 Average

20 cm

40 cm

60 cm

What is a Radiometer?

An indicator of radiant energy. Pay attention to the importance of the black and white vanes when you conduct your experiment. Be able to share out their role.

Your Turn• Refer to student guide page

90• What is the question that

you would like to explore? What variable are you changing?

• Make a table to gather your data

• Present idea before proceeding.