Natural Resources

5. a form of fossil fuel that is a gas, an example is methane
8. a type of energy from the sun
12. cut, processed wood from trees
13. a precious silvery-white metal, the chemical element of atomic number 78
14. a resource that once used, does not naturally get replenished
15. a form of energy that comes from water
17. a silvery-white metal, the chemical element of atomic number 28

1. a precious shiny grayish-white metal, the chemical element of atomic number 47
2. a flammable fossil fuel that looks like a black rock
3. a type of energy that comes from the heat of the earth
4. a salt or ester of phosphoric acid, containing PO43− or a related anion
5. a form of energy that comes from splitting atoms in reactors
6. the chemical element of atomic number 13, a light silvery-gray metal
7. a yellow precious metal, the chemical element of atomic number 79, used especially in jewelry and decoration and to guarantee the value of currencies
9. a resource that is naturally replenished over time
10. a strong, hard magnetic silvery-gray metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel
11. a form of energy that comes from the movement of air
16. a fossil fuel product, also called petroleum