Name ____________________________________________________________ Study Guide Key: Mineral and Rocks (p. 312-323)-Modified 1. A naturally occurring material of Earth’s surface is called a mineral. 2. This describes the way light reflects off a mineral (the type of shine): luster 3. Give some examples of words used to describe the type of shine. (pick 3): glassy dull waxy oily pearly earthy metallic 4. The way some rocks break with flat surfaces is called cleavage. 5. You can perform this test to find out a mineral’s hardness: the Scratch test 6. You can perform this test to find out a mineral’s streak color: the Streak test 7. Feldspar, mica, and quartz are 3 minerals in this rock: quartz, feldspar, mica 8. What does the Mohs’ scale tell about a mineral? hardness 9. Rocks with a number 2 on the Mohs’ scale would be considered soft. 10. Rocks with a number 9 on the Mohs’ scale would be considered hard. 11. Which mineral is the hardest on the Mohs’ scale? diamond 12. List the steps in doing the Scratch Test. a. Rub the rock to see if any powder comes off on your finger. b. Scratch the rock with your fingernail. c. Scratch the rock with a penny d. Scratch the rock with a steel nail. e. Scratch a piece of glass with the rock. 13. Can you always tell a mineral’s streak color just by looking at the mineral? Give an example. You cannot always tell a mineral’s streak color just by looking at a mineral. For example, iron pyrite looks gold, but its streak color is greenish black. 14. Which type of rocks form when magma or lava cools and hardens? igneous 15. Which type of rock forms from pieces of rock, sand, soil, clay and pebbles that are squeezed and cemented together? sedimentary 16. Which type of rock forms when other rocks are changed by heat and pressure? metamorphic 17. Name 4 properties used to identify minerals and rocks. (pick 4): color streak color texture luster cleavage crystal shape hardness 18. Which process continually changes rock from one kind to another over long periods of time? The rock cycle 19. Complete this sentence: All rock comes from other rock.(p. 322) 20.-27. Write each rock in the correct group: sandstone obsidian limestone marble gneiss granite pumice slate Igneous Obsidian Granite Pumice Sedimentary sandstone limestone Metamorphic marble gneiss slate *Each student will meet individually with Mrs. Wade. I will ask you to identify ten rocks of your choice from the tray containing rocks that we have worked with in class. Possible rocks include: Gray or pink granite Quartz Feldspar Mica Chalk Shale Sandstone Limestone Galena Marble Galena Sulfur Iron Pyrite (Fool’s Gold) Hematite Obsidian Pumice Basalt Gneiss Slate I may also ask students to… -point to a “soft” rock/ a “hard” rock -point to a rock with luster (you describe the luster) -point to a sedimentary rock -point to an igneous rock -describe how to do the streak test and tell why it is useful *Students should also be able to use a Properties of Minerals chart like the one in your packet to find the name of a given rock based on the properties given.