Crossword Challenge

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Across
  1. 1. The force that pulls objects towards Earth.
  2. 3. How fast something moves.
  3. 4. Variables kept the same to make the test fair.
  4. 8. Colours seen after rain.
  5. 9. The study of matter, energy, forces, and how things move.
Down
  1. 2. A tool used to measure temperature.
  2. 5. A smooth surface that reflects light.
  3. 6. Energy that we can hear.
  4. 7. Objects that attract iron.
  5. 10. The object ar the center of our Solar System.