Science Homework

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Across
  1. 3. System-
  2. 4. collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
  3. 7. all existing matter and space considered as a whole; the cosmos.
  4. 8. Way-is the spiral galaxy containing our solar system.
  5. 9. the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
Down
  1. 1. system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
  2. 2. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
  3. 5. the star that orbits the earth.
  4. 6. a science that deals with celestial objects, space, and the physical universe as a whole.