Find in the text verbs in the Past Simple Tense (Verb-form II), and Participle II (Verb-form III). What are their functions in the sentences? Translate these forms.

4. Define the following word combinations. Use them in the sentences or situations of your own:

· to be able to to postulate that

· the force of gravity to carry out experiments

· to be far from the earth’s surface to get smth right

· to turn one’s hand to to be regarded as

· planetary motion with the success of smth

Scan the text again, find the part which is of special interest and great importance to you, and explain why.

Write the plan of the text and make a report, based on it. It is desirable that you should apply new terms, concepts and phrases from above.

7. Work in pairs. Make up the English-Russian glossary on the theme of the lesson. Your glossary should contain 20 – 30 (or more) lexical units. Give the sources you referred to. Exchange your version with your partner’s one, then compare them, and complete each other’s variants of the glossary, if necessary.

8. Listen to the text Fractions and retell it:

http: //englishon-line.ru/chtenie-nauchnii-tekst28.html

9. Watch the video Newtonian Mechanics: Inclined Plane Analysis to define its main theses. Name at least 5 of them. Discuss the matters given in the video with your partner (you are expected to ask your partner some questions, give your reasons in explaining various phenomena, support different points of views, etc).

http: //www.youtube.com/watch? v=c2bO20DFcpA

Project work

Consult Internet, Encyclopedia or other sources of information to find some interesting and important facts concerning The Law of Gravitation. Present this information to the group.

Lesson 4

Read the text. Find out the items revealing different aspects of the theme given. Define the key facts of the text:

The Math Requirements for Diesel Mechanics

Diesel mechanics use math to maintain diesel engines.

Diesel mechanics maintain and repair diesel engines on a variety of machinery, including farm equipment, building site machinery and automobiles. According to the Bureau of Labor Statistics, job prospects are good for qualified diesel mechanics who have completed training through a community college, trade or technical school. National certification can enhance those prospects. Diesel mechanics use mathematics in a variety of ways on the job.

Technical Manuals

According to the University of Missouri, diesel mechanics need basic mathematics to read and understand technical manuals. Basic math involves addition, subtraction, multiplication and division.

Conversions

Diesel mechanics work with liquid engine components, so they need to be able to perform basic unit conversions like metric to imperial. For example, if a mechanic has a 12 liter tank, but the liquids come in gallons, he needs to be able to convert between gallons and liters.

Technical Skills

More and more diesel vehicles are being built with computers. Computers make a mechanic's job easier in some ways (for example, they can pinpoint a problem area), but in other ways, they make the job more technically and mathematically challenging. For example, if the manufacturer does not list resistance or other component value, the mechanic will have to make that calculation using an equation like R=V/P, where R=total resistance, V=total voltage and P=total power.

Instrument Use

A diesel mechanic uses a variety of tools that need mathematics. For example, engine bolts need to be tightened in a certain order and at a certain angle. Diesel mechanics must also be able to use instruments like a micrometer, which is used to measure the outside diameter of a sphere or cylinder. Other equipment used that involves math includes a gas analyzer, which measures gasses found in exhaust, requiring knowledge of percentages and ranges. For example, the range of carbon monoxide reported by a gas analyzer might be 0 to 4000 parts per million with a 2 percent accuracy. It is vital for a mechanic to know what this means in terms of vehicle analysis.

Stephanie Ellen

http: //www.ehow.com/list_6370184_math-requirements-diesel-mechanics.html

Comprehension work:

1. Insert necessary words and word combinations according to the text:

1. Diesel mechanics maintain and repair diesel engines on a variety of machinery, including ______________, ______________ and ____________.

2. Diesel mechanics work with ________ engine components, so they need to be able to perform basic unit conversions like metric to ___________.

3. Computers make a mechanic's job easier in some ways, but in other ways, they make the job more _________ and ___________ challenging.

4. If the manufacturer does not __________ or other component value, the mechanic will have to make that calculation using an ____________.

5. Diesel mechanics must also be able to use instruments like a _____________, which is used to measure the outside diameter of a __________ or _______________.

6. Equipment that involves math includes a ______________, which measures gasses found in exhaust, requiring knowledge of _______________ and __________________.

Work in pairs to find out:

1. What kinds of machinery do diesel mechanics maintain and repair?

2. For what purposes does a diesel mechanic need basic mathematics?

3. Diesel mechanics work with liquid engine components, don’t they?

4. In what ways do computers make a mechanic's job easier?

5. What kinds of tools that need mathematics are used by a diesel mechanic? Give an example.

6. How does a gas analyzer work?

7. Can you explain the equation R=V/P. Where is it applied?

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