1. 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 The Planets Review Game Show 100 200 300 400 500 100 200 300 400 500 Early Astronomers Inner Planets Outer Planets Other Bodies in Space Formation of Solar System

2. In the geocentric system of the ancient Greeks, all objects in space revolved around this. Early Astronomers for 100 Push the Space Bar to check your answer. What is Earth?

3. A Polish astronomer in the 1500’s who developed a Sun-centered model of the solar system. Early Astronomers for 200 Push the Space Bar to check your answer. Who is Nicolaus Copernicus? Push the Space Bar to check your answer.

4. An Italian astronomer who discovered Jupiter’s four largest moons. Early Astronomers for 300 Push the Space Bar to check your answer. Who is Galileo Galilei?

5. Early Astronomers for 400 A German mathematician who discovered that the orbit of each planet is an ellipse. Push the Space Bar to check your answer. Who is Johannes Kepler?

6. Early Astronomers for 500 An English scientist who explained why the planets stay in orbit. Push the Space Bar to check your answer. Who is Isaac Newton?

7. Inner Planets for 100 The third planet from the sun. Push the Space Bar to check your answer. What is Earth?

8. Inner Planets for 200 The nearest planet to the Sun. Push the Space Bar to check your answer. What is Mercury?

9. Inner Planets for 300 A lot of iron in the soil gives this planet a reddish color. Push the Space Bar to check your answer. What is Mars?

10. Inner Planets for 400 Thick, yellowish clouds block our view of this planet’s surface. Push the Space Bar to check your answer. What is Venus?

11. Inner Planets for 500 Its surface is heavily cratered like Earth’s moon. Push the Space Bar to check your answer. What is Mercury?

12. Outer Planets for 100 It has the most noticeable ring system made of pieces of rock and ice. Push the Space Bar to check your answer. What is Saturn?

13. Outer Planets for 200 The largest planet, characterized by the Great Red Spot. Push the Space Bar to check your answer. What is Jupiter?

14. Outer Planets for 300 This outermost planet is smaller than Earth’s moon. Push the Space Bar to check your answer. What is pluto?

15. Outer Planets for 400 Instead of being rocky worlds, the four largest planets are made of these. Push the Space Bar to check your answer. What are gases?

16. Outer Planets for 500 The axis of this planet is tipped almost parallel to its orbital plane. Push the Space Bar to check your answer. What is Uranus?

17. Other Bodies in Space for 100 Bodies of rock, ice, and gas with varied orbits around the Sun. Push the Space Bar to check your answer. What are comets?

18. Other Bodies in Space for 200 Most of these rocky bodies are located in a belt between Mars and Jupiter. Push the Space Bar to check your answer. What are asteroids?

19. Other Bodies in Space for 300 A streak of light, also called a shooting star, made when a fragment passes through Earth’s moon. Push the Space Bar to check your answer. What a meteor?

20. Other Bodies in Space for 400 The part of a meteor that doesn’t burn up in the atmosphere and strikes Earth’s surface. Push the Space Bar to check your answer. What is a meteorite?

21. Other Bodies in Space for 500 A cloud of gas that forms around the nucleus of a comet. Push the Space Bar to check your answer. What is the coma?

22. Formation of Solar System for 100 A force that causes interstellar material to come together enough to form stars. Push the Space Bar to check your answer. What is gravity?

23. Formation of Solar System for 200 Most material in a rotating cloud of gas and dust gathers in the center, compresses, and forms this. Push the Space Bar to check your answer. What is a star?

24. Formation of Solar System for 300 A cloud of gas and dust that forms stars and planets. Push the Space Bar to check your answer. What is an interstellar cloud/nebula?

25. Formation of Solar System for 400 Ms. T’s dog’s name Push the Space Bar to check your answer. Who is Watson?

26. Formation of Solar System for 500 Two main gases in interstellar clouds. Push the Space Bar to check your answer. What are hydrogen and helium?