Answer:
F Anthracite (the hardest coal)
Explanation:
Coal is a sedimentary rock that is formed from plant materials. These plant materials must have been trapped and compacted in an environment where they are not able decay. Such an environment is a swamp.
The first grade of coal that forms initially in such an environment is called PEAT. Peat is soft coal that still contains some plant materials. It has a high moisture content and the amount of carbon is still quite low.
With increasing pressure and compaction, PEAT grades into LIGNITE which has more carbon atoms in it. Lignite is more combustible although it is quite soft too. Lignite grades into SUB-BITUMINOUS coal and then BITUMIOUS coal.
The highest grade of coal is ANTHRACITE which is a hard coal. It has very little moisture content and rich carbon percentage in it. Anthracite yields more energy compared to other forms of coal. Anthracite is basically coal that forms at the greastest pressure. Beyond this pressure, a metamorphic transformation occurs and the coals changes to graphite.
Based on increasing pressure:
PEAT< LIGNITE< BITUMINOUS COAL < ANTHRACITE
Answer:
GDP per capita is a measure that results from GDP divided by the size of the nation’s overall population. So in essence, it is theoretically the amount of money that each individual gets in that particular country. The GDP per capita provides a much better determination of living standards as compared to GDP alone.
GDP takes into account all of the goods produced and services made available in a country over a specific period of time. Often, GDP is obtained quarterly and annually. GDP is a number that will ultimately indicate the overall economic health of the country. Though still widely accepted, it is not without significant flaws. Many bodies have already proposed and some had already implemented — alternate formulas or measures to gauge economic well-being.
Explanation:
Members of Congress) Sorry have to type more it will not let me post ok this should do it, have a great rest of your day.
Coastal Plains has the most geographic subsection
Erosion needs Earths rock
Erosion is wearing down and carrying away rocks by wind and moving water, happens faster with steep hillsides and heavy rain
