vocabulary

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Across
  1. 2. Strong and well.
  2. 3. The basic physical unit of heredity.
  3. 6. A physical exercise in which you stand with your feet together and arms down, jump up and spread your arms and legs far apart and land, then jump and bring your feet together and arms down again.
  4. 7. All the genetic material of an organism.
  5. 9. X and Y.
  6. 10. An exercise machine that consists of a moving strip or two step-like parts on which you walk without moving forward.
Down
  1. 1. To make your body or your arms and legs straight so that they are as long as possible, in order to exercise the joints.
  2. 4. The central part of an atom, usually made up of protons and neutrons.
  3. 5. An animal or human in the early stages of development
  4. 8. The activity of running at a slow, regular speed, especially as a form of exercise.