2. General Information 1. Define revolve : The circling of a smaller object around a larger object. 2. Define rotate : The spinning of an object on its axis. 3. How many planets have been found in our solar system? 13 4. Which planets are the inner planets? Mercury, Venus, Earth, Mars 6. Which planets are the outer planets? Jupiter, Saturn, Uranus, Neptune 8. What is the difference between the inner and outer planets? Inner planets are mostly rock, where outer planets are mostly gas spheres with rings.They are separated by the Asteroid Belt.
5. MERCURY 1. What causes Mercury’s atmosphere? It is small and it’s close to the sun 2. What two elements can be found in the atmosphere? Helium and sodium 3. What three processes shaped Mercury? The tectonic plate movements, meteorites impact, and volcanic eruptions shape mercury
