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to) the accumulation.
At the other extreme, migration as a separate phase in water
has the merit that this is the state found in the accumulation. The
problems relate to the mechanical difficulty of transporting
petroleum as a separate phase when it is disseminated through the
pore spaces with water (and disseminated it must be at some stage
between generation and accumulation, because the source material
itself is disseminated).

І. Choosing the Correct Definition for a Context:

th
According to the 4 sentence migration in aqueous
solution is good because:

a) it is faster;
b) it is slower;
c) it requires least work for its transport;
d) it requires more work for its transport.

II. Test Your Understanding of the Words:

“separate” in line 3 passage 1 means:

(a) linked; (b) distinct;

(c) fused; (d) different.

III. Comprehension Quiz.

The solubility level of petroleum in water is:

(a) high; (b) extremely high;

(c) relatively low; (d) extremely low.

IV. Selecting the Main Idea:

The main idea of passage 1 is:

a) petroleum does not change its state during migration;