Science crossword

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Across
  1. 1. the day when day and night are equal
  2. 4. a natural or artificial body that orbits a planet
  3. 6. living
  4. 8. a collection of stars, dust, and gas
  5. 9. a animal that eats both animals and plants
  6. 12. small body of ice, rock, and cosmic dust that orbits around the sun
  7. 13. a instrument that measures temperature
  8. 17. the short-term condition of the atmosphere
  9. 18. the period of time when earth rotates once on its axis
  10. 20. the periodic rise and fall of tides
  11. 22. amount of matter in a given space
  12. 23. a test model of a product
  13. 24. the distance light travels in one year
  14. 27. the capacity to do work
  15. 28. small rocky object that orbits the sun
  16. 29. the study of life
Down
  1. 2. the movement of cold nutrient rich water to the surface
  2. 3. mixture of gases that surrounds a planet
  3. 5. nonliving
  4. 7. an instrument that measures atmospheric pressure
  5. 10. a biome with little rainfall and extreme temperatures
  6. 11. any form of water that falls from the clouds
  7. 13. a biome that receives little rainfall and has cold temperatures
  8. 14. basic measure of length in metric system
  9. 15. an animal that only eats animals
  10. 16. when the shadow of one celestial object falls on another
  11. 17. the movement of air caused by differences in air pressure
  12. 19. part of earth where life exists
  13. 21. a relationship between two organisms live in close association with each other
  14. 25. amount of water vapor in air
  15. 26. heat