Name _____________________________________________ Date ___________________ Class________________
The Structure of the Solar System
Directions: On each line, write the term from the word bank that correctly replaces the underlined words in each
sentence, Use each term only once. NOTE: You may need to change a term to its plural form.
period of revolution
period of rotation
_____________________ 1. Many objects, including planets, travel around the Sun.
_____________________ 2. Orbiting objects made of gas, dust, and ice come from the outer parts
of the solar system.
_____________________ 3. The Sun is a(n) structure in space made of gases in which nuclear
fusion reactions occur.
_____________________ 4. In 365 days, Earth completes a(n) full journey around the Sun.
_____________________ 5. In 24 hours Earth completes a(n) full turn, also called a complete spin.
_____________________ 6. Millions of small, rocky objects orbit the Sun between the orbits of
Mars and Jupiter.
_____________________ 7. A(n) distance equal of about 150 million km is the average distance
from Earth to the Sun.