Across
- 2. sulfur impurities in fossil fuels add to this problem
- 4. the unit of measurement of energy
- 6. these materials are generally good insulators
- 9. coal, crude oil (petroleum) and natural gas are examples
- 13. the unit of measurement of electrical energy used to pay the electricity bill
- 15. formed from prehistoric forests
- 16. this change of state allows heat to leave a hot liquid
- 17. energy is passed through the vibration of particles in solids
- 19. heat from the sun can pass through the vacuum of space with this type of heat transfer
- 21. these materials are generally good thermal conductors
- 22. showing useful and non-useful energy transferred
- 24. calculated by dividing the energy transferred usefully by the total energy transferred
Down
- 1. use energy from the sun directly to heat water
- 3. formed from marine microorganisms
- 5. the quantity of energy required to cause a one degree C temperature rise in 1kg of a particular substance
- 7. the form of energy possessed by moving objects
- 8. at the end of the race, marathon runners wrap themselves in foil blankets to reduce heat loss by this
- 10. increasing the carbon dioxide content in the atmosphere can cause this
- 11. the rate of transfer of energy
- 12. convert energy from the sun into electricity
- 14. energy source caused by radioactive rocks underground
- 18. the unit of measurement of power
- 20. hot liquids or gases are pushed upwards by cooler fluid as it sinks
- 23. energy from, e.g, uranium, used to generate electricity