| A | B |
|---|
| Oil reserves | underground oil that has been discovered but remains unused |
| natural gas | gas within Earth's crust or outer layer |
| crude oil | petroleum as it comes out of the ground and before it has been refined or processed into useful products |
| nonrenewable resource | a resource that takes so long to form taht it can't be replaced. Oil, which takes millions of years to form is such a resource |
| renewable resource | a resource that can't be used up or that can be replaced quickly as it is used up. Ex: sunlight and wood |
| impermeable rock | preventing the passage of liquid or gas |
| tectonic plates | the diffrent parts of earth's crust |
| gross domestic product | measure of goods and services produced by a country each year |
| per capita | measures average income of the people in a country |
| solar energy | energy fromt he sun that can be converted into heat or electricity |
| infant mortality rate | number of deaths of babies under age one per 1,000 births per year |
