1. California Gold

2. 1. I predict that gold and other precious metals can be found: a) In areas with volcanic activity b) In mountain areas where rocks were formed from magma that cooled underground c) In ocean floor rocks

3. 2. I predict that gold in California can be found: a) In the Central Valley area b) In the coastal regions (by the ocean) c) In the Sierra Nevada Mountains

4. 3. I predict that gold is a mineral that: a) Humans could completely mine from the Earth one day and there would be no more b) Humans are able to create and produce c) Regenerates itself inside the Earth so that more is created over the years

5. 4. I predict that gold can be mined: a) From intrusive igneous rocks b) From placer deposits in river beds c) From both a) and b)

6. 5. When crystals (minerals) have a long time to cool underground from a magma, they: a)Are small b)Are larger

7. Discuss Numbers 1 through 4. Can you agree on the answers?

8. Subduction Sub  duc  tion When one lithospheric plate moves under another.

9. Batholith Bath  o  lith A large mass of magma cooling underground which creates igneous rock.

10. History of Plate Tectonics in California

11. Geothermal Ge  o  ther  mal The heat of the Earth’s interior. Wherever there is magma close to the Earth’s surface, humans can use the heat in that area from heated water or air to create energy – electricity or heating.

13. Mineral Natural inorganic, crystalline solid found in the Earth’s crust.

14. Minerals Z:\My Videos\Mineral Resources\What_Are_Minerals_.asf Igneous Rocks Z:\My Videos\Mineral Resources\Igneous_Rock.asf

15. Ores Deposits of minerals from which metals and nonmetals can be removed profitably ($$) are called ores.

16. Natural Resources Substances that exist naturally in the Earth and were not made by human beings. These substances have value to humans ($$$$).

17. Renewable A resource that can be replaced within a human life-time or as they are used. A tree, for example, is a renewable resource because more trees can be planted to replace those cut down.

18. Nonrenewable Non  re  new  a  ble The supply of the resource is limited and it cannot be replaced in a human life-time once it is used. Examples include minerals taken out of the Earth and oil pumped out of the Earth.

19. Placer gold Pla  cer gold Rocks with gold ore are weathered and eroded and pieces of gold are moved by river and stream waters, eventually deposited at the bottom of river beds.

21. Video Clip California Gold Rush Z:\My Videos\Mineral Resources\The_Gold_Ru sh.asf

22. Answer Questions 1 - 4 again. Have your answers changed?

23. 1. I predict that gold and other precious metals can be found: a) In areas with volcanic activity b) In mountain areas where rocks were formed from magma that cooled underground c) In ocean floor rocks

24. 2. I predict that gold in California can be found: a) In the Central Valley area b) In the coastal regions (by the ocean) c) In the Sierra Nevada Mountains

25. 3. I predict that gold is a mineral that: a) Humans could completely mine from the Earth one day and there would be no more b) Humans are able to create and produce c) Regenerates itself inside the Earth so that more is created over the years

26. 4. I predict that gold can be mined: a) From intrusive igneous rocks b) From placer deposits in river beds c) From both a) and b)