Chapter 6, Problem 38EAP

True or False. Decide whether each statement is true or false, and explain why.

1. On average, Venus has the hottest surface temperature of any planet in the solar system.
2. Our Moon is about the same size as moons of the other terrestrial planets.
3. The weather conditions on Mars today are much different than they were in the distant past.
4. Moons cannot have atmospheres, active volcanoes, or liquid water.
5. Saturn is the only planet in the solar system with rings.
6. Neptune orbits the Sun in the opposite direction of all the other planets.
7. If Pluto were as large as the planet Mercury, we would classify it as a terrestrial planet.
8. Asteroids are made of essentially the same materials as the terrestrial planets.
9. When scientists say that our solar system is about 4% billion years old, they are making a rough estimate based on guesswork about how long it should have taken planets to form.