1. Energy in the Atmosphere

2. Electromagnetic Waves
Nearly all energy in Earth’s atmosphere comes from the sun. This energy travels through space in the form of electromagnetic waves.

4. Radiation
Radiation is the direct transfer of energy by electromagnetic waves.
Example: your body heats up when hit by electromagnetic waves, this is called radiation.

5. 3- Types of electromagnetic rays:
Infrared Radiation
Ultraviolet radiation
Visible light
electromagnetic spectrum video.

7. Infrared Radiation
Creates heat. It has the longest wavelength.

8. Ultraviolet Electromagnetic waves
UV the Hidden Danger
electromagntic waves UV
causes sunburns and eye damage (UV) and has the shortest wavelength. This is the most dangerous type of radiation. Sunscreen helps protect us from this type of radiation.

9. electromagnetic waves that create color. ROY G BIV
Visible Light
electromagnetic waves that create color.
ROY G BIV
R= longest wavelength
V= shortest wavelength
Apples are red because they absorb every color but red. They reflect red so you see red.
White reflects all color. It absorbs nothing.
Black reflects no color. It absorbs it all.
What is Light? Video clip
apple light reflection video

11. Reflection of Light
As these electromagnetic waves travel through the atmosphere to earth, some of them are reflected and some are absorbed by particles in the atmosphere.
Reflection of light in all directions is called scattering. This causes the sky to be blue. The particles in the air scatter the blue and violet wavelengths. So we see blue.

12. Greenhouse Effect
The greenhouse effect is caused by the reflection of light back and forth between Earth and the blanket of gases surrounding the Earth.
This is what keeps Earth at a comfortable temperature for all the living organisms on Earth. Without it we would freeze to death.