Across
- 2. what flammable gas is often found near oil deposits?
- 7. What is the term for the depletion of nutrients in soil due to agricultural activities?
- 8. Which atmospheric layer contains the ozone?
- 14. What's the primary greenhouse gas from burning fossil fuels?
- 18. What do we call the layer responsible for the Earth's magnetic field?
- 20. What's the innermost layer of the Earth?
- 23. Frozen Earth parts?
- 24. What is the top layer of soil called, rich in organic matter and nutrients?
- 25. What formed the building blocks of stars and planets?
- 27. Molten Rock Below Earth?
- 32. Hardest natural mineral?
- 33. What is the term for the process of removing impurities from wastewater?
- 35. layer of the Earth is composed of solid rock?
- 36. Rock alteration through heat?
- 37. What's at the center of the Solar System?
- 40. solar System's Red Planet?
- 42. Which rocks form from the compaction of sediments?
- 44. Molten Rock Solidification?
- 46. What fossil fuel is often used for electricity generation?
- 47. What is the term for the loss of water from a land area through evaporation and transpiration?
- 48. What's produced as a byproduct of nuclear fusion?
- 49. What is the primary greenhouse gas released from wetlands and rice paddies?
- 50. What is the process of removing salt from seawater to make it suitable for drinking?
Down
- 1. What is the underground layer of water that saturates the soil and rock?
- 3. What is cosmic microwave background?
- 4. What refers to the part of Earth where life exists?
- 5. What is the name of the theory describing the formation of the solar system?
- 6. How did the universe begin?
- 9. Which energy source harnesses the movement of air?
- 10. What is the largest planet in our solar system?
- 11. What mineral is the primary component of sand?
- 12. What are rocks composed of?
- 13. Layer of gases around Earth?
- 15. What's the scale used to measure mineral hardness?
- 16. What converts sunlight into electricity?
- 17. what is the Earth's outermost layer
- 19. What part of the Earth's subsystems include all water on the planet?
- 21. What is the process of splitting atoms to release energy?
- 22. What energy source relies on the gravitational pull of the moon?
- 26. What's energy generated from the Earth's internal heat?
- 28. what is the layer of rock and minerals located below the Earth's surface?
- 29. Limestone Main Component?
- 30. What's the process of breaking down rocks into smaller pieces?
- 31. What force holds planets in orbit around the Sun?
- 34. What is the term for energy derived from organic materials?
- 38. What is the term for the contamination of groundwater by harmful substances?
- 39. What is the body of water formed by the convergence of a river and the sea?
- 41. What term describes the gradual wearing away of soil and rock by natural processes?
- 43. Early Universe Matter?
- 45. Solar System's Inner Planet?