"Natural Elements"

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Across
  1. 3. Living creatures of various kinds.
  2. 4. A vital liquid for life.
  3. 6. Earth's natural satellite.
  4. 7. Produces heat and light.
Down
  1. 1. A star at the center of our solar system.
  2. 2. Green and growing organisms.
  3. 3. What we breathe.
  4. 5. The planet we live on.