Class V

Natural gas is composed mainly of which type of gas?
  1. propane
  2. methane
  3. butane
  4. ethane
Coal, a common fossil fuel, is formed from which of the following types of organic matter?
  1. freshwater algae
  2. freshwater algae
  3. marine organisms
  4. tree trunks, leaves, and freshwater plants
The quality of coal, called its rank, is a measure of which of the following characteristics?
  1. The quality of coal, called its rank, is a measure of which of the following characteristics?
  2. amount of oxygen in the coal
  3. how black it is
  4. how hard it is
The greatest concentration of oil is found in which of the regions of the world given below?
  1. North America
  2. South America
  3. the Middle East
  4. Europe
What is one difference between a common organic fuel such as wood, and a fossil fuel?
  1. Wood burns more slowly
  2. Fossil fuels burn faster
  3. Fossil fuels make more efficient fuels
  4. Wood is in higher demand
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