Science Practice Quiz 5th Grade

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