Unit 2: The Solar System and Universe Unit Test Review

Do you have any additional questions?

1. 1. What is the difference between a meteor and a meteorite?

• a. A meteor burns up in the atmosphere while a meteorite reaches Earth's surface
• b. A meteor is larger than a meteorite
• c. A meteorite burns up in the atmosphere while a meteor reaches Earth's surface
• d. There is no difference between the two terms

2. Which model of the solar system places the Sun at the center?

• a. Ptolemaic model
• b. Heliocentric model
• c. Geocentric model
• d. Lunar model

3. What are the frozen ice, gases, rocks, and dust particles that orbit the Sun and form a tail when near the Sun?

• a. Asteroids
• b. Meteoroids
• c. Comets
• d. Satellites

4. What force caused the nebular cloud to begin contracting?

• a. Magnetic forces
• b. Nuclear fusion
• c. Gravity
• d. Solar winds

5. The Milky Way is what type of galaxy?

• a. Irregular galaxy
• b. Elliptical galaxy
• c. Spiral galaxy
• d. Lenticular galaxy

6. Which ancient astronomer proposed the heliocentric model of the universe?

• a. Copernicus
• b. Galileo
• c. Ptolemy
• d. Newton

7. What is the main difference between an asteroid and a comet?

• a. Asteroids are larger than comets
• b. Comets are made of metal, asteroids are made of ice
• c. Asteroids are mostly rock and metal, comets contain ice and dust
• d. Comets orbit the Sun, asteroids don't

8. Most asteroids in our solar system are located where?

• a. Between Mars and Jupiter
• b. Beyond Neptune
• c. Between Earth and Mars
• d. Between Venus and Mercury

9. The geocentric model of the universe placed which object at the center?

• a. The Sun
• b. The Moon
• c. Jupiter
• d. Earth