Learning Experience 2.1 What did you learn? Use the word bank to complete the text you worked with last session. Fossil Fuels Material Crude Oil Energy Source Organic Plants chemically Animals Dinosaurs Coal Pressure Oil Shale Natural Gas Source Rock Non-Renewable Petroleum Environment Decay Organisms Marine Deposits Sedimentary Layers Rapid burial Carbon-Rich Compound s Heat Oil and Gas Formation __________ are the world’s most commonly used _________. They are stores of energy formed from the remains of ______ and ________ that lived millions of years ago – hence the name fossil fuels. ______, _____ and ___________ are examples of fossil fuels. As these cannot be replaced easily they are called ____________ sources of energy. Oil is also called crude oil or ___________. The word petroleum means “rock oil” or “oil from the earth”. It was formed from the remains of animals and plants that lived in a _________ (water) ____________, millions of years ago. When __________died and sank to the bottom, they were covered in mud, sand and other mineral ___________. This ___________ prevented immediate ________, which would normally occur if organisms remained exposed on the sea floor. The lack of oxygen in the ________________ caused organisms to slowly convert into _____________________. These compounds mixed with surrounding sediments and formed __________, which is a type of fine-grained _______. As more layers deposited on top of one another, _________ and _______ acting on the source rock ____________ converted the ______________ into what we call ____________.