World?

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Across
  1. 2. The lowest layer of the atmosphere.
  2. 3. The coldest place on Earth.
  3. 7. Gas that depletes the ozone layer.
  4. 9. Earth's natural satellite.
  5. 10. Earth's orbit around the sun.
  6. 16. Wegener Scientist who developed the theory of continental drift.
  7. 18. The liquid layer within Earth's structure.
  8. 19. dioxide Gas that contributes to global warming.
  9. 21. Trench The deepest point on Earth's surface.
  10. 25. The 4th planet from the sun.
  11. 27. The location of a continent on the globe.
  12. 28. Artificial objects orbiting Earth.
  13. 30. level rise Rising sea levels due to melting glaciers.
  14. 32. The longest mountain range on Earth.
  15. 34. Elephant The largest land animal on Earth.
  16. 35. Type of pollution that harms Earth’s nature.
  17. 37. Rainforest The largest forest on Earth.
  18. 38. A factor affecting Earth's gravitational pull.
  19. 42. The earliest period of Earth's history.
  20. 44. dating Method used to determine the age of Earth.
  21. 45. A greenhouse gas responsible for climate change.
Down
  1. 1. Everest The highest peak on Earth.
  2. 4. The direction of Earth's rotation.
  3. 5. Types of climates found on Earth.
  4. 6. energy The most abundant energy source on Earth.
  5. 8. Large landmasses separated by oceans.
  6. 11. storms An event that affects Earth's magnetic field.
  7. 12. gases The main cause of global climate change.
  8. 13. Valley The hottest place on Earth.
  9. 14. The metal found in Earth's core.
  10. 15. The area with the most ocean water.
  11. 17. The planet that is mostly covered in water.
  12. 20. The continent with the highest human population.
  13. 21. Natural resources in the Earth's crust.
  14. 22. The phenomenon of day and night caused by Earth's rotation.
  15. 23. Ocean The largest ocean on Earth.
  16. 24. tectonics The science that explains continental formation.
  17. 26. Rainforest The largest tropical rainforest on Earth.
  18. 28. The largest desert on Earth.
  19. 29. Agreement An important treaty in climate change.
  20. 31. Marineris The largest crater on Earth's surface.
  21. 33. The largest island on Earth.
  22. 36. The most densely populated city on Earth.
  23. 39. Total underground water resources.
  24. 40. The most abundant gas in Earth's atmosphere.
  25. 41. Baikal The largest freshwater lake on Earth.
  26. 43. Falls The highest waterfall in the world.