Class V

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
Oil and gas are mainly derived from which of the following sources?
  1. trees and larger plants
  2. phytoplanktonic material found in marine basins
  3. freshwater algae
  4. dead animals
Natural gas is composed mainly of which type of gas?
  1. propane
  2. methane
  3. butane
  4. ethane
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
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
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