Page 202 - Science Course 3 (Book 2)

Mo13-L1: Lesson Review Quiz (Multiple Choice)

Direction: On the line before each question or statement, write the letter of the correct answer

1. An object that orbits the Sun, has a spherical shape, and has a mass greater than the mass
of other objects near it is a(n)
A. star.
B. planet.
C. asteroid.

2. What keeps planets in orbit around the Sun?
A. the Sun’s mass
B. the Sun’s period of rotation
C. the Sun’s gravitational force

3. The planets in the solar system are so far apart that scientists measure the distances
between them in
A. miles.
B. kilometers.
C. astronomical units.

Mo13-L1: Lesson Review Quiz (Matching)

Direction: On the line before each def nition, write the letter of the term that matches it correctly.
Each term is used only once

_____________ 4. object made of gas, dust, and ice
A. comet
_____________ 5. the time it takes an object to travel around the Sun B. star

_____________ 6. the time it takes an object to spin once C. period of rotation
D. period of revolution
_____________ 7. type of object at the center of the solar system
E. asteroids
_____________ 8. spherical objects made mainly of solid, rocky materials F. outer planets

_____________ 9. small, rocky objects that orbit the Sun between Mars and Jupiter G. inner planets

_____________ 10. large spherical objects made primarily of the gases hydrogen and helium.

11. Describe the locations of asteroids and comets in the solar system.

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