Practicing forms of verbs in geologic texts

Give the proper forms past tense or past participle:

 drink (infinitive) - drank (past tense) - drunk (past participle)
search                  - searched                  - searched
e.g. The earth´s outer solid layer, the lithosphere, is …………..(make) of rock.

1.    His theory essentially .................  (hold) that mountains were created by the squeezing
of certain rocks.

2.    Plate tectonic theory .......................(arise) out of two separate geological
observations.

3.    Contour lines are not ………………….  (draw) for every separate altitude.

4.    A turbine is ……………… (spin) by flowing water.

5.    The grain used to be ………………… (grind) for flour in windmills.

6.    Some minerals are …………………. (seek) after for jewelry.

7.    The basis of crystallography was ................... (lay) by recognising the octahedral
habit of diamond.

8.    The layers that have been under great pressure may be noticeably ………….. (bend) or ……………….
(fold).

9.    The sedimentary rock can be deeply …………….... (bury) in the earth.

10.  Rocks in the depth must be ……………… (raise) to the surface and exposed before
they can be ………………. (break) down and ………………………..(dissolve) by the weather.



Complete the sentences with one of the verbs from the clue.


Began     bent     blown   brought     decayed     failed     found     molten     raised
seek     split
 1. Minerals like copper, silver, gold and lead are also ...................... in extinct
volcanoes.
 2. The outer part of the earth´s core may be …………………  .

3.      Some modern scholars, such as Fielding H. Garrison, are of the opinion that
      modern geology .......................  in the medieval Islamic world.

4.      The layers of water, petroleum, and natural gas tend to .................. their own
levels.

5.      In nuclear fission, part of the nucleus of an atom is .............. away.

6.      Cold water is heated by the rock and ..................... back to the surface.

7.      Contour lines are always ............. toward a higher elevation when they cross a stream.

8.      The sand from The Sahara Desert is sometimes .................... many kilometres away.

9.      ........................... remains of plants and animals were later covered with sediment.

10.  Peat ……………… to decay completely and changed to lignite.

11.  2 …………….. to the power of 3 equals 8.