2. Hosted by Mrs. Dempsey

3. 100 200 400 300 400 Solar System Other Objects Inner Planets Outer Planets 300 200 400 200 100 500 100

4. Row 1, Col 1 What is the difference between the geocentric vs. heliocentric models of the universe? Who proposed the heliocentric model? Geocentric is Earth-centered/heliocentric is Sun- centered=Copernicus

5. 1,2 Our sun belongs to what Galaxy? Approximately how old is our Sun? Milky Way / 4.6 byo

6. 1,3 Name the terrestrial planets in our solar system. Place them in order from smallest to largest.

7. 1,4 Name three ways the outer planets are different from the inner planets Size, mass, # of moons

8. 2,1 Name the planets in order starting with the one closest to the sun MVEMJSUN

9. 2,2 Name 2 dwarf planets and their location in the solar system DD Pluto Ceres

10. 2,3 What is retrograde rotation? Name one planet that rotates this way Venus

11. 2,4 Each of the gas planets are surrounded by a set of rings. What are these “ rings ” made of? Particles of ice and rock

12. 3,1 What are 3 conditions that a planet must possess in order to be considered a planet? Massive enough to be spherical, orbit the Sun, own neighborhood.

13. 3,2 How are meteors, meteorites, and meteoroids different?

14. 3,3 Which inner planet has almost no atmosphere? Why? Mercury/ so close to Sun causes gas molecules to move very fast and escape and so small weak gravity

15. 3,4 How do the planets stay in orbit? Gravity / Inertia

16. 4,1 Name 2 pieces of evidence that Galileo “saw” that supported his heliocentric theory of the universe. Phases of Venus/Moons of Jupiter

17. 4,2 Where are most comets found? Name the 3 parts of a comet. Kuiper belt/Oort cloud Head(coma+nucleus) tail

18. 4,3 Name three reasons Mars will be difficult to colonize? Temperature, thin atmosphere=liquid H2O would turn into gas, Co2 atmosphere,

19. 4,4 Which planet rotates on its side? What does this rotation do to it days and nights? Uranus.

20. 5,1 Describe the contributions of Johannes Kepler to “modern” astronomy True shape of planetary orbits=ellipse

21. 5,2 Name 3 places in our solar system that has water on it Moon, Earth, Mars, Comets,

22. 5,3 What causes Mars to have seasons? Why is Mars called the “ red ” planet? Tilted axis and revolution around Sun / iron oxide covers its surface

23. 5,4 Name one unique feature for each of the gas planets