Science Practice Quiz 5th Grade

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Across
  1. 2. This comes from petroleum
  2. 6. Materials ______ as they get cooler
  3. 10. The basic building blocks of all matter are
  4. 12. When water absorbs enough heat, it turns into a ___ called steam
  5. 13. We know of how many elements
  6. 16. About 3/4 of the elements are
  7. 17. When a change of _____ occurs, the identity of the substance stays the same
  8. 18. Particles that contain more than one atom joined together are called
  9. 19. When the temperature of a material increases, its particles move ______
  10. 20. This takes the shape of their containers
  11. 21. The number of ____ in an atom determines what element it is
Down
  1. 1. A measure of how much space a sample of matter takes up
  2. 3. As more matter gets packed into the same amount of space, the material's density does what?
  3. 4. As long as conditions such as ____ do not change, the density of a substance does not change
  4. 5. The melting point is also called the freezing point
  5. 7. is made up of molecules that have different kinds of atoms joined together
  6. 8. When molecules are linked in organized positions, a _____ results
  7. 9. Solids keep their ___
  8. 11. A measure of the amount of matter in an object is?
  9. 14. Petroleum is a complex mixture of what?
  10. 15. Materials ____ as they get hotter