pulse 1. (pÅ­ls) n. 1. The rhythmical throbbing of arteries produced by the regular contractions of the heart, especially as palpated at the wrist or in the neck. 2. a. A regular or rhythmical beating.
Fossil fuels are made up of plants and animals that lived in the past and have been converted to fossil fuels by geological processes over time. And as plants convert the suns energy into sugars, fossil fuels are stored solar energy. The energy comes from the energy that was previously in dead plants/animals... to understand better read about the carboniferous period. It explains how fossil fuels were created, through the compression of decaying plant material that had lots of locked up carbon underneath layers of sediments. The sun.
Explore the trend with our interactive chart. | Graphic by Daniel Wood, Energy Department. Fossil energy sources, including oil, coal and natural gas, are non-renewable resources that formed when prehistoric plants and animals died and were gradually buried by layers of rock.