7. Find out the sentences containing gerundial constructions and define the function of Gerund:

1. A grinder is a machine for producing fine particle size reduction.

2. A grinding mill crushes material between two closely placed, heavy objects.

3. Mechanical forces trench the structure by overcoming of the interior bonding forces.

4. Different types of industrial grinders used for breaking down and mixing rough material.

5, A rotating cylinder is partially filled with balls, usually stone or metal.

In industrial and manufacturing process there are different types of industrial grinders.

6. Cascading effect decreases the material to a very fine and give it powder shape.

7. Impact crushers can be adapted for wet crushing to produce a slurry.

8. Make a brief engineering report explaining the difference between a ball mill and an impact crusher. Mention the design, the principle of work and materials to be processed.

9. Using the following list of items explain what processes can be used to efficiently achieve the specified particle size reduction of each material. Take into consideration physical properties of the materials.

Clay, gravel, lime, gypsum, soft metallic ores, large rocks, iron ore, concretes, graphite, dry chemicals, viscous materials, sand, activated carbon

10. Pick up the key words from the text “Grinders”. Make up your own sentences with them.

11. Write an abstract to the text “Grinders”.

12. Get ready for presenting the topic “Grinders” at the conference ”Innovations in Science and Engineering” based on the following questions of Task 4.

Lesson 10

1. Role-play "At the Conference". Learn some useful language and sample scripts included below. Choose the topic you would like to present to your classmates. Act it out.

Roles:

1) The Chairperson

2) A reporter

3) An active listener.

The Chairperson

Welcome to the …… annual……….. of the……... It is great to see ………………….. here celebrating the genius and innovation of …………… over the years. It has been a long time since ……………… and look how far we’ve come! Are you happy to be here?

……is pleased to host this conference in ……….. this year where we will have the opportunity to ………….!

I know that many of you have traveled from quite a distance and I’d like to acknowledge our members from ……………. who have made this long trip to participate in the largest, most extensive …………….. we have ever had.

Among the activities we have planned are workshops about the ………………… such as the ………..as well as demonstrations of …………….

We are honored to………

It's a pleasure to…………..

Prepare yourself to be……………

Welcome…………..!

The reporter

The purpose of this report is to……….. and to briefly discuss…………. By examining a range of……….. The aims of this project are to examine ………. I am sure you will be interested by…… Because this topic is very………And I am going to explain why…….. This report presents………Let me show you how……..There are lot of advantages of……………..but……………I am very……….for your attention and………If you have some……..you can…….

The active listener

Do you think our lives have been improved by………?

Do you have any ideas or ambitions to…………..?

What are some of the ways the………..?

What is the best thing about the……….?

What problems do the………….?

Is it expensive to……….?

Why is it a good idea to………..?

Why should you be careful about……..?

Why is it very important not to………..?

How…………….?

What are the main……………?

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