Touring the Solar System

• By what criteria are planets considered either terrestrial or Jovian? • How is crater density used in the relative dating of surface features of the Moon? • What evidence suggests that Mars had an active hydrologic cycle in the past? • Compare and contrast asteroids and comets?  Where are most asteroids within the Solar System found? • What are the three main sources of meteoroids in the Solar System? • What characteristics does a celestial body possess to be classified as a dwarf planet? • Explain why the terrestrial planets have meager atmospheres compared to the Jovian planets. • What is the nature of Jupiter’s Great Red Spot?