click below
click below
Normal Size Small Size show me how
Geology 101 -03
Energy Sources & Alternative Energy
| Question | Answer |
|---|---|
| What fossil fuels provide most of the energy in the US? | coal, natural gas, petroleum, oil |
| What is crude oil and what are the 2 elements the compounds it is mostly made from? | Petroleum -carbon and hydrogen (hydrocarbons!) |
| How do oil and gas start their lives? How are they born? | plankton! |
| Where does oil get trapped after it migrates? | reservoirs - pockets in rock |
| Describe primary and secondary oil. What are some methods of enhanced oil recovery? | Primary - using no techniques beyond pumping Secondary - pumping water into reservoirs to fill empty pore spaces and buoy more water to the surface gas injection, chemical injection, microbial injection, thermal (heat) recovery ((setting it on fire)) |
| What are some alternate sources of oil and gas? | oil sand, tar sand, gas hydrates, methane hydrates |
| From what is coal formed? | Remains of plants |
| How is coal classified? | by type and sulfur content based on % of C and its heat value on combustion |
| How much plant life is required to make 1 foot of coal? | 7 ft + |
| What are some of the environmental issues associated with burning coal? | gases and ash |
| Whare are the 2 types of processes that can generate nuclear energy? Which one is more common? | Fission and Fusion. Fission is more common. |
| What happens during nuclear fission? | large nuclei split into smaller ones |
| What isotope is commonly used in most modern nuclear reactors? | Uranium |
| About 95% of the uranium reserves around the world are found in... | sedimentary and metasedimentary rocks |
| Why are most geothermal energy plants located near plate boundaries? | its where the most heat is radiated from the earth's surface |
| What are some limiations that restrict geothermal energy? | geothermal fields have a short lifespan power plants and the resource cannot be moved minimal # of sites are suitable |
| Traditional geothermal power generation uses.... | water or steam heated by hot rocks near the surface |
| What needs to be present in hydropower? | large volume of water & rapid movement of water |