A fact about life on earth
Half of all living things live on 6% of the land on the planet, the rain forest. No word on how much this fact changes everyday, but it's safe to say it's an estimate.
What is the altitude of the sun relative to Earth ?
The altitude of the sun varies throughout the year. On December 21st (sometimes the 22nd) the sun is 20 degrees above the horizon, it's lowest point of the year. On June 21st (sometimes the 20th) the sun is 65 degrees above the horizon, it's highest point of the year.
Do you know what days these are? They are the winter & summer solstice.
Reference: Winter Sun Design
More facts about the earth.
More earth facts
How are rainbows made?
Rainbows are a result of the sun's white light being broken up into it's component colors through the prism of a raindrop. This division of white light into its component colors is called Dispersion. The light is often double-reflected on either side of the raindrop before exiting and headed your way.
The color of a light wave see depends on the frequency of the light wave entering your eyes.
This explains why we see the colors of a rainbow, but how come all the colors line up next to each other? Since different frequency light waves bounce and reflect differently meaning that the different colors line up coming at a slightly different angle from each other. (note: the frequency of a wave is the number of cycles of a wave to pass some point in one second. )
Solar homes in the u.s.
More than 10,000 homes and counting in the United States are powered entirely by solar energy.