Задания к тексту
- 1. Finish the following sentences according to the text.
1) The rank of a deposit of coal depends on ...
2) Bituminous coal contains …
3) … is the lowest rank of coal with the lowest energy content.
4) Lignite coal deposits were not subjected to …
5) Coal is composed of...
6) The energy in coal comes from the energy ...
7) A layer of dead plants was covered by ...
8) Coal miners use giant machines ...
9) Surface mining can be used when the coal is buried ..
10) Underground mining is used when the coal is buried ...
- 2. Decide whether the following statements are true or false.
1) Surface mining is cheaper than underground mining,
2) Rocks and dirt, sulfur and unwanted materials are removed from coal at a preparation plant.
3) Coal is burnt by power plants to make steam.
4) Coke is used for smelting iron ore into iron.
5) Coal is an inflammable black or brown sedimentary rock.
6) The pressure and heat from the top layers helped the plant remains turn into coal.
7) Bituminous coal formed about 100 to 300 million years ago is the least widespread rank of coal in the US.
8) Bituminous coal has a higher heating value than subbituminous coal.
9) Lignite is a relatively young coal deposit.
10) The strength and flexibility are given to steel by the use of coke.
- 3. Answer the questions and give examples.
1) How much carbon does subbituminous contain?
2) What type of coal is crumbly and has a high moisture content?
3) What are the two methods of mining coal?
4) What is done at the plant?
5) When is coal ready to be shipped to market?
6) Why is coal a nonrenewable energy source?
7) What does the classification of coal depend on?
8) How much carbon does anthracite contain?
9) Do the steel and iron industries use bituminous coal? Why? Why not?
10) How is coke made?
- 4. Fill in the following table and answer the questions below.
|
Type of coal |
Quantity of carbon
|
Quantity mined in the US |
Heating value |
Pecularities
|
|
Anthracite |
…
|
…
|
the highest
|
…
|
|
… |
…
|
about 50 %
|
…
|
…
|
|
…
|
… |
…
|
…
|
100 mln years old |
|
… |
25 – 35 % |
… |
… |
… |
1) What type of coal is the most valuable? Why?
2) What type of coal is the most widespread in the USA?
- 5. What parts of the text can you define? Do they correspond to the paragraphs? Name each part.
1._____________________ 4._________________________
2._____________________ 5._________________________
3._____________________ … ________________________
- 6. Find key words and phrases which best express the general meaning of each part.