Post-reading exercises

Task 1. State the synonyms to the following words. Pay attention to the meaning of the word in the text.

consistent
equal
lattice
distinctive
tend to
associate with
depend on
identify
set

Task 2. You have one minute to read this part of the text. Complete the following text with the missing information. DON’T PEEP INTO THE TEXT!

Minerals tend to break along lines or smooth ____________ when hit sharply. Different minerals break in different ___________ showing different types of cleavage.

________________ is defined using two sets of criteria. The first set of criteria ____________ how easily the cleavage is obtained. Cleavage is considered ____________ if it is easily obtained and the cleavage planes are ___________ distinguished. It is considered good if the cleavage is produced with some difficulty but has _________ cleavage planes. Finally it is considered ___________ if cleavage is obtained with difficulty and some of the planes are difficult to ______________.

The second set of criteria is the ______________ of the cleavage surfaces. The names correspond to the shape formed by the ______________ surfaces: Cubic, rhombohedral, octahedral, dodecahedral, basal or prismatic. These criteria are defined specifically by the ___________of the cleavage lines.

Task 3. Complete the following sentences by unscrambling the bolded words. Spell the word. Give its definition.

1. KSETRA shows the true color of the mineral.

2. SARSHDEN is a measure of the mineral’s resistance to scratching

3. EAVCLGAE is considered perfect if it is easily obtained and the cleavage planes are easily distinguished.

4. IDHAYEITANP is a mineral’s degree of transparency or ability to allow light to pass through it.

Task 4. There is a spelling mistake in each line. Write the correct word in the space provided.

Streak refers to the color of the mineral in powderd form, ________________ viewed after the mineral is rubed on an unglazed porcelain _______________ tile or streak plate. Streek color is more diagnostic than _________________ mineral color because it is constant for a paticular mineral. ______________ A mineral may come in saveral colors, but its streak is the _________________ same color for all. Streek color is not always what one might ______________ predict from examining the mineral; a spakling silver-colored ______________ mineral, specular hematit, has a red-brown streak, and pyrite, _____________ a golden metalic mineral, has a dark gray streak. _________________________

Task 5. Compose questions to the text, using the following Wh-words: what, which, where, when, how.

Example: This is called the crystal lattice. HOW is this called?

Task 6. Compose the sentences using the following words and phrases:

1. To stick

2. Several colors

3. Can be scratched by a fingernail

4. Sufficient

5. Metallic or nonmetallic luster

6. Crystal lattice

7. Random

8. Immediate identification

9. Facilitate

10. Various types

Task 7. Give examples of the following physical properties of minerals.

For example, Quartz can be of nearly any color because of slight mineral impurities. It can be cloudy, white, pink, purple, red, black, orange and brown….

1. Color

2. Luster

3. Hardness

4. Cleavage

5. Fracture

6. Streak

7. Taste

Task 8. Put a preposition in spaces:

1. In opaque minerals, the color tends _________ be more consistent.

2. The particular shape is determined _______ the arrangement of the atoms, molecules or ions.

3. The luster of a mineral is affected _____ the brilliance of the light.

4. There are degrees ______crystalline structure, in which the fibers _____ the crystal become increasingly difficult or impossible to see _______ the naked eye or the use _____a hand lens.

Дата добавления: 2015-10-29