{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

EOC_ch19

Essential Environment: The Science behind the Stories (3rd Edition)

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 19 Testing Your Comprehension 1 Fossil fuels, especially oil products, predominate today because they are efficient to burn, ship, and store. Natural gas is cleaner burning, and coal is most plentiful. They are all considered nonrenewable because they are being extracted and consumed much faster than they are being formed naturally. 2 Net energy is the amount of energy produced minus the amount of energy input. EROI is the ratio of the amount of energy produced to the amount of energy input. These concepts are important indicators of the efficiency of an energy source. 3 Fossil fuels form slowly from the remains of the anaerobic decomposition of organic matter, under appropriate conditions of temperature and pressure. Natural gas can form by anaerobic bacterial action relatively near the surface. It can also form by heat and pressure deeper underground, which converts organic material into kerogen, the precursor of both natural gas and crude oil. Because the ideal conditions of organic material accumulation, anaerobic conditions, pressure, and temperature are not evenly distributed, neither are the resulting deposits of fossil fuels. 4 Coal is used to generate electricity by burning the coal, using the heat of combustion to boil water and generate steam pressure, and using the steam pressure to turn turbines and a generator.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern