Year 7 review

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 4. Red liquid pumped around the body by the heart (5)
  2. 7. A community of organisms where each member is eaten in turn by another member (9)
  3. 9. The application of heat to change something from a liquid to a gas (7)
  4. 11. The rate at which energy is drawn from a source that produces a flow of electricity in a circuit (7)
  5. 12. State of matter with a fixed shape (5)
  6. 13. An instrumentality needed for an undertaking or to perform a service (9)
  7. 14. A number or ratio derived from a series of observed facts (9)
  8. 15. A heavy odorless colorless gas formed during respiration and by the decomposition of organic (13)

Down

  1. 1. A community of organisms where there are several interrelated ___ chains (7)
  2. 2. A way of doing something, especially a systematic way (6)
  3. 3. Any of various water-soluble compounds capable of turning litmus blue and reacting with an acid (6)
  4. 5. The process of changing from a gaseous to a liquid or solid state (12)
  5. 6. A tiny piece of anything (8)
  6. 8. The process of purifying a liquid by boiling it and condensing its vapors (12)
  7. 10. A flow of electricity through a conductor (7)
  8. 16. Any of various water-soluble compounds having a sour taste and capable of turning litmus red (4)