Across
- 2. Oil and natural gas are made from microscopic ___ organisms that have been buried over time.
- 5. Oil is used mostly for ___.
- 8. Coal is formed from the remains of dead ___ plant matter that has been buried over time.
- 10. ___ is a rock made from ancient swampy plant material that has been deeply buried and compacted over millions of years
- 12. The term, ___ is used because all three are formed in the geological past from the remains of living organisms.
- 13. Natural gas is used mostly for ___ and cooking.
- 16. People are using fossil fuels ___ than the Earth can replace them
- 18. The Earth takes ___ of years to replace fossil fuels.
- 19. Oil is also known as ___.
- 21. Oil is also known as ___ ___.
- 22. ___ a thick black liquid that is made from microscopic marine organisms that have been deeply buried and compacted over millions of years.
- 24. Burning fossil fuels can put this into the atmosphere
- 25. Fossil fuels exist in a ___ supply, which means they will eventually run out.
- 26. Natural gas is used mostly for heating and ___.
Down
- 1. composition, conditions and ___ are the three factors that play a role in what fossil fuel forms
- 3. The majority of our ___ comes from fossil fuels.
- 4. ___ is a mixture of gases that is made from microscopic marine organisms that have been deeply buried and compacted over millions of years.
- 6. Coal, oil and natural gas are also called ___ ___.
- 7. Oil is used to make ___ products, which is why we are encouraged to recycle it
- 9. Nuclear energy and fossil fuels are ___ resources.
- 11. Natural gas is known as the ___ fossil fuel.
- 14. Coal is used mostly for ___.
- 15. Oil is knows as the ___ fossil fuel.
- 17. one of the three factors that plays a role
- 20. The energy generated during nuclear fission by splitting Uranium atoms
- 23. Coal is known as the ___ fossil fuel.