Earth science crossword

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Across
  1. 3. – The layer of gases surrounding Earth.
  2. 5. Year – Distance light travels in one year.
  3. 8. – Breaking down of dead plants and animals.
  4. 14. – Rain, snow, sleet, or hail falling from clouds.
  5. 15. – Evidence that galaxies are moving away from each other.
  6. 16. – A large body that orbits a star.
  7. 17. – Greenhouse gas made by animals and decaying matter.
  8. 18. Fuels – Source of extra CO₂ added by humans. (You can duplicate if you want shorter crossword size)
  9. 20. – Forms of nitrogen that plants can take in from the soil.
  10. 21. of Earth
  11. 22. – Gas that protects Earth from ultraviolet rays high in the sky.
  12. 24. – Water changing from liquid to gas.
  13. 27. and Cosmology
  14. 28. – Water released from plants into the air.
  15. 29. Fuels – Energy sources like coal and oil formed from ancient life.
  16. 32. Dioxide – Gas made of carbon and oxygen, a key greenhouse gas.
  17. 33. – Process that returns nitrogen gas back to the atmosphere.
  18. 35. Effect and Climate
  19. 36. – Process where living things release energy and carbon dioxide.
  20. 37. – Water vapour cooling and forming clouds.
  21. 38. – Planet with a runaway greenhouse effect.
Down
  1. 1. Warming – Rise in Earth’s average temperature due to added gases.
  2. 2. – The universe’s ongoing increase in size.
  3. 4. – All of Earth’s water, including oceans, rivers, and ice.
  4. 6. – Force that pulls matter together in space.
  5. 7. – Earth’s solid outer layer, including rocks and soil.
  6. 9. – Type of heat radiation trapped by greenhouse gases.
  7. 10. – Water flowing over the land into rivers and oceans.
  8. 11. Fixation – Process where bacteria change nitrogen gas into a usable form.
  9. 12. Effect – Process where gases trap heat in Earth’s atmosphere.
  10. 13. – Burning of fuels that releases CO₂ into the air.
  11. 19. – Large group of stars, gas, and dust held together by gravity.
  12. 23. – Movement of soil and rock that can carry phosphorus into water.
  13. 25. – Minerals that add phosphorus to soil and water.
  14. 26. – Process where plants use sunlight, CO₂, and water to make food.
  15. 30. – All living things on Earth.
  16. 31. – A huge ball of glowing gas that gives off light.
  17. 34. Oxide – A powerful greenhouse gas released from fertilizers.