Fill in the Blanks Fossil FuelsOnline version Select the correct word to complete the sentence. by Virtual School Bahamas 1 Coal , oil and natural gas are some of the most important fuels . A fuel is a substance that is to release its stored energy . They are also called fuels . Fossil fuels are made from decayed plants and that lived long ago . Coal was formed from the remains of . Coal is grouped as either hard or soft . coals were formed most recently . They were under low pressures and low temperatures . coals are the oldest coals and were formed under high temperatures and high pressures . Oil and natural gas formed the same way that coal was formed . However , they were formed from the remains of simple animals and plants . These tiny organisms lived on the earth many of years ago . Over time , high pressures and changed their remains to oil and natural gas . Many common products are made from oil . and diesel fuel are both made from oil . One of the main products made from natural gas is . Methane is the gas that is burned in most stoves . Coal , oil and natural gas are resources .
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