Science

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Across
  1. 3. discovered gravity through an apple
  2. 6. the time it takes to complete one cycle
  3. 8. 6CO2+H2O -> C6H12O6+6O2
  4. 11. the number of occurrences of a repeating event per unit of time
  5. 12. electrostatic discharges through the atmosphere
Down
  1. 1. makes up 71% of the earth
  2. 2. from the ocean to the atmosphere
  3. 4. waste product of a tree
  4. 5. the variety of life in a particular habitat
  5. 7. hot and bright
  6. 9. scientist's corpse is radioactive
  7. 10. endangered insect species