____ 14. Minerals that contain combinations of carbon and oxygen in their chemical structure are called
____ 15. ____ are minerals that contain both sulfur and oxygen (SO4).
____ 16. Minerals are classified based on chemical composition into which two groups?
silicates and nonsilicates
organic and inorganic
carbons and noncarbons
crystalline and noncrystalline
____ 17. Which of the following is NOT a property that is commonly used to identify minerals?
____ 18. Because of factors such as weathering and impurities, ____ usually is NOT a reliable indicator of a mineral's identity.
____ 19. On Mohs' hardness scale, which of the following minerals is the softest?
Complete each statement.
20. Gold and silver are ____________________ because they are each composed of a single type of atom. (elements or compounds)
21. Minerals that contain a combination of silicon and oxygen are called ____________________ minerals.
22. Minerals that do NOT contain a combination of silicon and oxygen are called ____________________ minerals.
23. Which two elements are most common in minerals?
24. Explain why each of the following is not considered a mineral: a cupcake, water, teeth, oxygen.
25. How do you determine a mineral's streak?
26. While trying to determine the identity of a mineral, you decide to do a streak test. You rub the mineral across the plate, but it does not leave a streak. Does this mean your test failed? Explain your answer.
Oxygen and silicon are the most common elements in minerals.
PTS: 1 DIF: I OBJ: 3-1.2
A cupcake is not a mineral because it does not have a crystalline structure and it does not form in nature. Liquid water is not a mineral because it does not have a crystalline structure and it is a liquid, not a solid. (Water ice can be considered a mineral.) Teeth are not minerals because they are a living part of your body. Oxygen is not a mineral because oxygen atoms by themselves do not have a crystalline structure.
PTS: 1 DIF: II OBJ: 3-1.1
Scrape the mineral across a ceramic streak plate. The color of the material that rubs off the mineral sample is the mineral’s streak.
PTS: 1 DIF: I OBJ: 3-2.1
No; the test was actually successful. You learned that the unknown mineral has no streak and that it is harder than the streak plate. This clue will help you classify the mineral.