Multiple Choice
QUIZ 8 and 10
MULTIPLE CHOICE
1. When all the grains in a rock are roughly the same size, the rock is said to be ______.
o B) well sorted
2. Sediment that is carried and deposited by the wind is known as ______sediment.
o E) eolian
3. The figure above shows what type of sedimentary rock?
o B) biogenic
4. A ______is a sedimentary deposit that forms where a stream enters a standing body of water.
o A) delta
5. ______is the reduction of pore space in sediment as a result of the weight of the overlying sediments.
o B) compaction
6. A turbulent, gravity driven flow consisting of water and sediment is known as a ______.
o C) turbidity current
7. Which of the following is a type of sedimentary rocks formed by the precipitation of minerals dissolved in a lake, river, or seawater?
o C) chemical
8. According to the figure above, ______is the temperature at which melting starts.
o D) 800ºC
9. ______refers to the range of sediment grain sizes in a rock. Well ______means the grain sizes in the rock are all the same, whereas poorly ______means there is a wide range of sizes represented.
o B) Sorting, sorted, sorted
10. ______refers to how close the grains are to being perfectly spherical. The range of ______is from angular to round.
o C) Roundness, roundness
TRUE/FALSE
11. Mudcracks are sedimentary structures that are formed in wet/dry environments.
o TRUE
12. A semi-enclosed body of coastal water where fresh water mixes with marine water is known as a delta.
o FALSE
13. The figure above shows a sedimentary structure that is formed by wind.
o FALSE
14. Coal is a classified as a chemical sedimentary rock.
o FALSE
15. Metamorphic rocks can occur from sedimentary and igneous rocks.
o TRUE
FILL IN THE BLANK
16, ______is the process in which substances dissolved in pore water are precipitated out and join grains together. CEMENTATION
17. Most of the sediment on land is transported by ______. RIVERS
18. Seasonal lakes that form in arid areas are known as ______. PLAYAS
19. ______grade metamorphic rocks are changed under temperatures of less than 400°C and pressures of less than 400MPa. LOW
20. Rocks that are metamorphosed at temperatures and pressures higher than 400°C and 400MPa respectively are known as ______grade . HIGH
21. ______is the metamorphic rock that results from the metamorphism of limestone. MARBLE