an imprint made by the outside of a dead plant or animal

hammers and chisels

resources formed from the remains of once-living organisms

made up of dead swamp plants that have been buried and squeezed for hundreds of years.

sediments or minerals that fill a mold

something that tells if it was walking, or running

produces a lot of heat when it is burned

burns at a high temperature and used in factories

show changes long-dead animals made in their surroundings

something that tells how an animal look

mostly a gas called methane

burns at a cooler temperature and not as good fuel

mineral slowly takes the place of original, once-living material

scientists study this to determine how old a fossil is

petroleum is mainly used for this

burns very hot with little smoke or ash

heat and pressure may destroy most of the buried remains leaving only a thin film or sheet of black carbon

this layer is on the bottom

natural gas is used for this

this resource is usually pumped out in order to use it