Solar System

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Across
  1. 3. 53% smaller than Earth. Also known as the "Red Planet" because of its majority of iron and soil.
  2. 4. 30 astronomical units from the sun. Has 16 moons, and was the first planet discovered with math.
  3. 5. Giants space snowballs made frozen gases, rock, and dust. Given nicknames like "Halley's____" and "Great ____ of 1811."
  4. 7. 71% of this planet is water. It is the only planet in our solar system that can sustain life.
  5. 9. It is the sixth planet from the sun. Known for its rings.
Down
  1. 1. Rains sulfuric acid, sometimes called "Earth's Evil Twin". One day on this planet is equal to 243 Earth days.
  2. 2. Is the largest planet in our solar system. Could fit 1000 Earths if it was hollow.
  3. 3. Smallest planet in our solar system. The closest one to the sun.
  4. 6. Happens when meteoroid burns up in the atmosphere.
  5. 8. A chunk of rock that can become a planet. Has the ability to travel 25 km per second.
  6. 9. Can be up to 27 million degrees Fahrenheit. It keeps all planets in orbit.