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10. Listen again to the text and decide whether these sentences are true (t) or false (f):

  1. All things in the universe can be measured

  2. The mass of a quark and the charge on an electron are constants.

  3. Gravity is a force like electricity or radiation.

  4. Modern physicists look mostly at things we can’t see.

  5. The main problem of modern physics is putting together very small things of quantum physics and very big things like galaxies.

  6. “Dark matter” and “dark energy” make up most of the universe.

  7. The universe consists mostly of “dark matter”.

SPEAKING

11. Imagine that you are a great physicist working on problems of forces. You are invited to the students’ scientific conference to tell students about your research in the field of gravity, friction or magnetism and to answer their questions. Work in small groups.

12. You are going to take part in a students’ scientific conference. Prepare a report about gravity on different planets, magnetic poles of our planet, friction in nature and its role in our life.

WRITING

13. Imagine that your friend asks you for help, because he has to write a test on the topic «Gravity, Friction, Magnetism». In order to help him you have to be well prepared and understand the topic. Write a short paragraph (60-80 words) about these forces and be ready to tell about them to your friend. You may use words and word combinations from the box below:

- force of gravity - magnetism - north/south pole

- measurement - attract/repel objects - electricity

- motion/movement - quantum mechanics - electrons

- distance - coefficient of friction - electromagnet

GRAMMAR IN USE

These tasks can help you to practise grammar topic “Question types” (See Appendix 1 p. 210 – 212) and do the following exercises.

14. Put as many questions to each sentence as possible.

  1. Magnets have two opposite ends.

  2. Computer technology is a growing industry.

  3. Electromagnets have many practical uses.

  4. Computer can conduct experiments.

  5. Magnetism involves electrons and electricity.

  6. Much work has been done to create artificial intellect.

  7. The development of science has increased man's knowledge.

15. Put disjunctive questions to the sentences.

1. They are going home from university, …..?

2. The exam wasn’t difficult, …..?

3. You have cleaned your bike, …..?

4. You have to get up early, …..?

5. We write, read and speak English during the lessons, …..?

6. There were a lot of students at the lecture, …..?

7. You can't swim very well, …..?

16. Write questions to which the words in bold are the answers.

  1. Each planet has its own gravity

  2. Here on Earth we measure gravity using a scale.

  3. The coefficient of friction for two materials may differ depending on the type of friction involved.

  4. Other types of friction include rolling friction and fluid friction.

  5. Scientists often like to use the word mass instead of weight.

  6. MRI machines in hospitals use magnetism to make a picture of the inside of your body.

  7. Invention of electronic computers is one of the greatest achivements of mankind.

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