COPE Listening: why is the sky blue?

Fill each gap with ONE word only.

1. The distance between each _____ in a wave of light is called the wavelength.
2. When all the different wavelengths travel together, light appears _____.
3. _____ light waves have a longer wavelength than blue.
4. The atmosphere is made up of _____ which change the way light behaves.
5. Shorter blue light waves _____ with particles more often and spread throughout the atmosphere, filling the sky.
6. Other colours pass through and appear _____-white when they mix together.