1. solar system planet gravity telescope comet asteroid meteor meteorite Lesson 3 Splash

2. What is the solar system? Sun Neptune Saturn Uranus Jupiter Mars Earth Venus Mercury Lesson 3 a

3. How do we learn about the solar system? Telescopes make faraway objects seem closer. Lesson 3 b

4. Mercury What are the rocky planets? Venus Mars Earth Lesson 3 c

5. Jupiter Uranus Saturn What are the other planets? Neptune Lesson 3 d

6. What else is in our solar system? A comet is mostly ice mixed with rocks and dust. When it approaches the Sun a tail forms made of gas and dust. Lesson 3 e

7. Compare Earth to the other planets in the solar system. Main Idea Earth is the only planet with oxygen and liquid water. Earth is much smaller than the gas giants. Earth is the only planet that supports life. Main Idea Review

8. ____________ are mostly ice mixed with rocks and dust. ____________ make faraway objects seem closer. ____________ are round objects in space that are satellites of the Sun. ____________ is a force of attraction between all objects. The large rocks that are found in the belt between Mars and Jupiter are called ____________. asteroids Vocabulary gravity Comets cometsplanetstelescopes Telescopes Planets Gravity Vocabulary Review a

9. A meteor that reaches Earth’s surface is called a ____________. The Sun and all the objects in orbit around it make up our ____________. If a meteoroid enters Earth’s atmosphere, it is called a ____________. meteor Vocabulary solar system meteorite Vocabulary Review b

10. Main Idea and Details Extend and fill in the graphic organizer to show the parts of the solar system. End of Lesson The Sun is at the center of our solar system. Rocky planets include Mercury, Venus, Earth, and Mars. Jupiter, Saturn, Uranus, and Neptune are gas giants. Pluto is a dwarf planet. Comets, asteroids, and meteoroids also orbit the Sun. G.O. Review