Chapter 21 Lesson 1 - 2 Crossword Puzzle

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Across
  1. 3. What is made of gas, dust, and ice that moves around the Sun in an oval-shaped orbit?
  2. 4. What are millions of small, rocky objects called that orbit the Sun in the asteroid belt between the orbits of Mars and Jupiter?
  3. 5. What is the average distance from Earth to the Sun - about 150 million km?
  4. 7. What is a mixture of gases and surrounds a planet from gravitational pull?
  5. 8. What are the planets closest to the Sun, that are made of rock and metal, and have solid outer layers called?
  6. 10. What occurs when a planets atmosphere traps solar energy and causes the surface temperature to increase called?
Down
  1. 1. What is the time it takes an object to travel once around the Sun called?
  2. 2. What is the time it takes an object to complete one rotation called?
  3. 6. What are nearly spherical shapes that have a mass bigger than objects around them and orbits the sun called?
  4. 9. What is the largest object in our solar system that gives of energy and is a star?