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