Atlantic Cape Community College Earth Science 100 -Geology Quiz Prof. J. Sacchin

Question

Atlantic Cape Community College Earth Science 100 -Geology Quiz Prof. J. Sacchinelli me Date: Section: RECTIONS: Fill in the circle next to your selection that best answers the estion. Each question is worth one extra credit point (15 points max). Good 1. The tendency of minerals not to break along smooth flat surfaces is called a. streak b. fracture cleavage d. conchoidal e. polyhedral 2. Which of the following is not a characteristic of minerals? a. possesses a crystalline structure formed by organic processes c. have definite chemical composition represented by a chemical formula d. exist as a solid e. naturally occurring 3. Basalt is classified as a (n) igneous rock. a. Medium or Intermediate-colored b. Coarse-grained c. Plutonic d. Extrusive e. Foliated 4. The appearance or quality of light reflected from the surface of a mineral is call a. hardness b. fluorescence c. strealk d. color e. luster texture. 5. Gneiss, a metamorphic rock, exhibits a. Fine-grained b. Coarse-grained c. Glassy d. Medium e. Foliated

Explanation / Answer

1. The tendency of a mineral "NOT" to break along smooth flat surface is called FRACTURE

2. minerals are not formed by ORGANIC PROCESSES

3. Basalt is classified as EXTRUSIVE IGNEOUS ROCKS formed above or near the surface of the earth by crystallisation of magma.

4. The appearance or quality of light reflected from the surface of a mineral is called "LUSTER".

5. Gneiss has a COARSE GRAINED TEXTURE.

6. Acid test is used to perform on CARBONATE ROCKS ,reacting with acid gives sizzling sound and forming bubbles like on the surface of the rock.

7. COLOR is the least reliable as the mineral property cannot be concluded by seeing the color and many rocks showing similar colors if you see with naked eye.

8. Native minerals containing element occurring in nature in uncombined state, so GRAPHITE contains CARBON. All the other minerals in the options occur in combined state.

9. FLOURITE is the mineral which is non metalic showing vitreous luster, having light color, often transparent and reacts with acid to become soluble.

10. Rusting, oxidation of iron is a form of CHEMICAL WEATHERING.

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