Week 7 Spelling Words

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Across
  1. 4. The force that pulls objects toward Earth.
  2. 6. A measure of how hot or cold something is.
  3. 7. A group of atoms joined together.
  4. 8. Living things interacting with their environment.
  5. 11. The study of life.
  6. 12. A basic substance made of one type of atom.
  7. 14. The study of matter and energy.
  8. 15. A mixture where one substance dissolves in another.
Down
  1. 1. A group of similar living organisms.
  2. 2. A test done to learn something new.
  3. 3. A trait helping a living thing survive.
  4. 5. A substance used in or produced by reactions.
  5. 9. A living thing.
  6. 10. The ability to do work.
  7. 13. A change that happens when substances combine.