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3-sediment that come from land : a- are called cosmogenous sediments.
b-are called volcanogenous sediments.
c-are called terrogenous sediments.
4-terrigenous sediments form : a- by the chemical weathering of rocks
and erosion.
b-dead parts of marine organisms.
c-dissolution of toxic substances in seawater.
5-Marine sediments can be subdivided on the basis : a- of their size.
b-of their origin.
c-of their size and origin.
6-the size of marine sediments : a-varries from enormous boulders to
tiny grains and particles.
b-does not vary and consist only of enormous particles.
c-does not vary and consist only of tiny particles.
7-tiny particles of marine sediments are called : a- colloids.
b-coarse sand.
c- slurry.
8-the most common sediment in the ocean are :a- gravel.
b- mud and sand.
9-the composition of marine sediment is : a- the same.
b- different.
10- there are : a- three different categories of marine sediments.
b-five different categories of marine sediments.
c- two different categories of marine sediments.
11-Biogenous sediments : a- are made of the hard parts of marine
organisms.