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Coal - PowerPoint PPT Presentation


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Coal. Where Does it Come From? . COAL . What is Coal? . A black rock . Comes from the remains of plants that have been compressed over millions of years in the Earth. . It is about 75% carbon Also may contain sulfur, hydrogen, oxygen, nitrogen, and other substances. . What is in coal? .

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Presentation Transcript
slide1

Coal

Where Does it Come From?

what is coal
What is Coal?

A black rock

  • Comes from the remains of plants that have been compressed over millions of years in the Earth.
  • It is about 75% carbon
  • Also may contain sulfur, hydrogen, oxygen, nitrogen, and other substances.

What is in coal?

where is it
Where is it?
  • So, if coal is buried under millions of years of dirt and water, how do we get it out of the Earth?
mining
Mining

Surface Mining

  • Miners use earthmovers to remove surface of the earth to get the coal.
  • If coal is close to the surface of the Earth they will use this method.
  • Miners like this method because it is not as expensive.
  • Unfortunately, it also destroys the land at the surface.
  • Miners dig tunnels into the Earth.
  • Then they use tools and explosives to remove the coal from the rock of the Earth.
  • Some mines are 1,000 feet deep.

Shaft Mining

what happens then
What Happens Then?
  • After the coal is removed from the Earth it is loaded into mining cars and brought to the surface.
  • Then it is cleaned
  • Then it is loaded on to trains for transportation
slide7
Whew…
  • Let’s take a break and watch a video.
    • Return to the website and watch “How do they do it: coal mining?”
review
Review
  • Let’s review what we know so far.
    • Coal is a black rock made up mostly of carbon
    • It lies beneath millions of years of Earth
    • Miners work to remove it from the Earth
    • It is a source of energy for us
    • Top mining states are Montana, Wyoming, Kentucky, West Virginia, and Pennsylvania
vocabulary
Vocabulary
  • Carbon: a chemical element found in coal as well as plants and animals
  • Fuel: a substance that is used for heat or energy
  • Mine: a place where miners work to get certain materials out of the Earth
  • Nonrenewable: can be used up—there is a limited supply
where
Where?
  • Where is

coal mined?

why do we want the coal
Why do we want the coal?
  • Why is coal important, and why do miners work so hard to bring the coal to the surface?
    • The main use of coal today is for electricity.
    • Plants burn the coal to create steam, the steam powers machines that create electricity.
slide12

It is also used to help transform iron into steel.

  • Coal heated to make coke coke can be heated to high temperatures changes iron ore to iron iron is used to make steel
  • The high temperatures give steel strength and flexibility
  • It can then be made into things like bridges and automobiles.
is coal the only thing we mine
Is Coal the only thing we mine?
  • No! We get many things through mining.
  • Let's Do Some Cyber Prospecting!
    • Click on the link and when you arrive, choose a state and click on it to see what they mine. Don’t forget to fill in question 3 as you prospect.
types of fuel
Types of Fuel
  • Here are some other types of fuel. Make sure and jot them down in your journal.
    • We have already learned about coal
      • Do you remember that coal is a nonrenewable substance?
    • Other nonrenewable fuels
      • oil and natural gas.
    • Other fuels
      • Ethanol
      • Petroleum
you be the judge is coal good or bad
You be the judge…..is coal good or bad?
  • PROS
    • We have a large supply
    • It is cheaper to make coal into an energy source than other substances
    • Provides energy for plants and electricity for homes
  • CONS
    • Releases pollutants into the air
    • Coal ash can be highly toxic
    • Mixes with oxygen when it burns and creates carbon-dioxide, which increases Earth’s temperatures
did you know
Did you know?
  • The Hopi Indians were the first people to use coal in North America.
  • Thomas Edison built a coal-fired electric generating plant in 1882.
credits
Credits
  • http://www.eia.gov/kids/energy.cfm?page=coal_home-basics#coal_mining-basics
  • http://www.msha.gov/KIDS/MINING.HTM
  • http://www.eulesstx.gov/recycling/steel_making.htm
  • http://science.discovery.com/videos/how-do-they-do-it-coal-mining.html