25. Old lithosphere is destroyed in association with:
a.deep-sea trenches
b.fracture zones
c.mid-ocean ridges
d.spreading centers.

26. From smallest to largest, which list of sediment textures is in the correct order?
a. Clay, sand, silt, pebbles
b. Clay, silt, sand, pebbles
c. Pebbles, sand, silt, clay
d. Silt, clay, pebbles, sand

27. Why is quartz one of the most abundant constituents of lithogenous sediments?
a. Quartz is composed of silica, which is common in continental rocks
b. Quartz is formed in the arid environments of deserts, which only occur on land
c. Quartz is one of the most durable minerals in continental rocks, so it resists weathering
d. Quartz grains come from continental mountain belts

28. The Calcite Compensation Depth (CCD) is the depth in the ocean where ____________ equals ____________.

a. acidity – dissolution potential
b. temperature – the dissolution point
c. carbonate saturation – carbonate undersaturation
d. carbonate dissolution – carbonate s
theres a cutoff on #28:

d. carbonate dissolution – carbonate supply

__________________
Yahoo! Answers 4ever