Science Crossword Puzzle

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Across
  1. 3. The ____ of an object tells us how massive something is for its size
  2. 5. Materials ______ as they get hotter
  3. 6. When the temperature of a material, its particles move _______
  4. 9. When a liquid _______, it gradually changes to a gas
  5. 12. Air is much less dense than water, so a beachball _____
  6. 14. An objects weight depends on its _____ in the universe
  7. 15. Gases fill the _____ of their containers
  8. 17. Anything that has mass and takes up space is ____
  9. 18. Mass is often measured in _____
Down
  1. 1. An objects ability to float is called its _____
  2. 2. Scientists use a quantity called the ____ to measure force
  3. 4. Solids keep their _______
  4. 7. The liquid in a _______ expands or contracts with changes in temperature
  5. 8. Materials _______ as the get cooler
  6. 9. A measure of how much space a sample of matter takes up is ______
  7. 10. The ____ of an object is a measure of the force of gravity between Earth and the object
  8. 11. When materials ______ energy well,they allow energy to flow through them easily
  9. 13. Substance that are ______ expand or contracts the most with changing temperature
  10. 16. _____ take the shape of their containers
  11. 17. A measure of the amount of matter in an object is _____