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Astronomy Unit Test Study Guide
Astronomy
1. What is the heliocentric view of the Universe? List the scienctists who held to the heliocentric view.
2. Describe the evidence observers may have used to support the heliocentric theory.
3. What is the geocentric view of the Universe? Which scientists held to the geocentric view?
4. Describe the evidence observers may have used to support the geocentric theory.
5. Place the following in numerical sequence, smallest to largest.
___Milky Way ____Earth ___Virgo Supercluster ____USA ____North America
___ Solar System ___Local Group Orion Arm Universe
6. What is the definition of universe?
7. What two forces keep the solar system in its current formation? How does each work?
8. What factors affect gravitational force? (Hint: Think about the reason the moon biggest influence on tides and the reason everything in the solar system revolves around the Sun.)
9. If inertia were the only force acting on a planet, how would the planet travel?
10. What are three differences between the inner and outer planets?
11. Which planet is called Earth’s sister? Give two reasons why.
12. List the eight planets in order from the Sun. Beside each, write unique fact about the planet.
1.2.
3.
4.
5.
6.
7.
8.
13. List the eight planets in order from smallest to largest. List one different fact about each planet.
1.2.
3.
4.
5.
6.
7.
8.
14. What are two unique characteristics of asteroids, meteoroids, and comets?
AsteroidsMeteoroids
Comets
15. How are meteors different from asteroids?
16. What do comets have in common with asteroids?
17. Describe the three parts of a comet.
18. Describe the main location of asteroids and other debris from the origins of the universe.
19. What are two likely reasons why more meteorites and dust debris collide with the other planets and moons than they do with Earth?
20. What is the theory about how the universe development which has the most scientific evidence?