1 Revolution Revolution Revolution Revolution RevolutionThe purpose of this presentation is to help you understand the terms of rotation and revolution as it relates to the planets in our solar system. How does the animation to the right show the meaning of these words? Revolution Revolution Revolution Revolution Revolution Rotation &

2 Before Pushing Start… Try to make a hypothesis of what will happenWill the planet start spinning on it’s axis or orbiting the sun? Will it rotate or revolve faster or slower compared to the Earth? How will it’s rotation compare to it’s revolution?

3 Earth • Start Start 1 day 365 days

4 Mercury • Start Start 58.64 days 87.6 days

5 Venus • Start Start 243 days 226.3 days clockwise

6 Mars • Start Start 1.03 days 686 days

7 Jupiter • Start Start .41 days 4,329 days

8 Saturn • Start Start .43 days 10,753 days

9 Uranus • Start Start .65 days clockwise 30,664 days

10 Neptune • Start Start .67 days 60,152 days

11 Planet Rotation and RevolutionPlanets Revolution (in Earth days) Direction Rotation Mercury 87.60 Counterclockwise 58.64 counterclockwise Venus 226.30 243.00 clockwise Earth 365.00 1.00 Mars 686.20 1.03 Jupiter 0.41 Saturn 0.43 Uranus 0.65 Neptune 0.67 Discussion Which planets have days longer than their years? Which planet would you have to wait the longest to have your birthday every year? Compared to Earth would a planet with a 12 hour day have a shorter or longer rotation? Which planet would rotate the most in one year?