CROSSWORD CLUES ACROSS 3. Animals that lack a backbone. 4. Animals that have a backbone. 6. The force of attraction that holds atoms or ions together. 7. The energy stored in a body because of its position. 9. In a tug of war the winning team does _______

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Across
  1. 2. The energy stored in a body because of its position.
  2. 6. Animals that lack a backbone
  3. 8. The smallest unit of an element that retains its chemical properties.
  4. 9. Animals that have a backbone
  5. 10. A group of segmented worms, such as earthworms
Down
  1. 1. Work is the product of mass, acceleration and what else?
  2. 3. In a tug of war the winning team does ________ work.
  3. 4. Energy possessed by a body because of its motion is called ________ energy.
  4. 5. The force of attraction that holds atoms or ions together.
  5. 7. A bond formed when atoms share electrons.