Fourth Grade
Worksheets
Natural Gas
Natural gas is a non-renewable resource. Natural gas and oil form in similar ways. Millions of years ago, when some plants and animals died, they fell to the ground. They were covered with mud and soil. Over time, this mud and soil turned to rock. The decaying plants and animals turned into natural gas. People learned that they could use the natural gas for heat when they saw it catch on fire. Natural gas is found by geologists. These are scientists who study rocks. They look for certain rocks that usually contain natural gas. They tell people where to dig wells. Natural gas does not have an odor. This can be dangerous. It can easily catch on fire. A strong-smelling chemical is added to .....
