Why Is the Sky Blue?

Why is the sky blue and not purple, green or orange? It's all because of how the Sun's light reaches Earth!

Comprehension Questions:

1. You can separate and see all the colors in white

light if you shine sunlight through a specially shaped crystal called a

2. True or False: Particles of dust, pollution, or smoke in the air can cause the whole sky to glow red.

3. Why do we only see blue light when we look up on a sunny day?

4. In what pattern does light travel?

Answer Key:

1. Prism

2. True

3. Blue light is scattered more than the other colors because it travels as shorter, smaller waves.

4. Waves

Learn more at

https://spaceplace.nasa.gov/blue-sky/

Find more fun videos, games, and articles about space and Earth science at

https://spaceplace.nasa.gov/

Voiceover provided by NASA scientist Dr. Moogega Stricker