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Resource Consumption. Renewable vs. Non-renewable Coal Formation. Think – Pair – Share . Think. about what makes a resource renewable or non-renewable up with a partner and create a l ist of renewable and non-renewable resources with the class. pair. share. - PowerPoint PPT Presentation
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Resource Consumption
Renewable vs. Non-renewableCoal Formation
Think – Pair – Share
about what makes a resource renewable or non-renewable
up with a partner and create a list of renewable and non-renewable resources
with the class
What’s the difference?
• Renewable – Can be replaced in a reasonable amount of time – Nuclear, wind, solar
• Non-Renewable– Cannot be replaced in a reasonable amount of
time, once it’s gone, humans can no longer use it– Coal, natural gas, lumber
Time frames
• Coal: 100 year supply of bituminous coal, 457 year supply of sub-bituminous coal, and 171 year supply of lignite
• Natural Gas: 60 year supply
• Solar energy: solar panels may need to be replaced every 25 years, but the sun will supply continuous energy
Coal Formation
• Environment: – A wetland/marsh, where organic material
accumulates under water– The organic material is compressed under new
layers– Peat is formed
Peat ?
• Peat is further compressed, and the wetland dries up
• Under heat and pressure, lignite forms
• Under even more heat and pressure, more water is squeezed out of lignite to form sub-bituminous coal
Lignite ?
• Once sub-bituminous is heated and squeezed, bituminous coal forms, and has very little moisture content
• This is the most abundant type of coal• More than 50% of coal production in U.S.
Sub-bituminous ?
• The last step is the formation of anthracite coal
• This is considered a metamorphic rock because of the extreme heat and pressure needed
• Most rare, burns slowly, hardest, only found in PA in the U.S.
Bituminous ?
Hilt’s Law
• In a small area, the deeper the coal, the higher its grade.
• This law only holds true if the thermal gradient is vertical.
• Horizontal/lateral changes in rank may be occur if the thermal gradient is not completely vertical
Summary
Open Discussion
• You took a walk and found a lump of peat, and a lump of sub-bituminous coal. Which one is older? How can you tell?
• The two most important factors in making coal are ______ and ______.
• What are the five types of coal? In what order do they form?
• Is coal a renewable resource? Explain.• Instead of burning coal, what are a few
alternative energy sources?
Poster
• Start working on your coal formation poster– Include arrows to show the linear progression of
the different types/grades of coal– Label each type– Include labels/arrows for heat and pressure– Include at least 2 facts about each type of coal– Include how much longer each type will last at
current rate– Include pictures/graphics/text where appropriate– Cite your facts!!!
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