2. Read the text again and write down the words you don’t know. Guess the meaning of the words. Compare them with your partner. If you couldn’t guess, consult a dictionary.

3. Fill in the diagram with missing information from the text.

Comprehension Check

1. The text has nine paragraphs A-I. Which paragraph mentions:

a) future power plants; b) operating principle of a jet engine c) classification of jet engines.

2. Define the main idea of paragraph A. Find the supporting details that help to develop the main idea.

3. Explain the difference between:

a) piston engine and jet engine

b) rocket engine and jet engine

4. Match the terms with their definitions.

1. In this type of engine energy is derived a. jet engine

from a chemical reaction which takes

place inside the engine.

2. This is the combination of a turbine b. piston engine

and a propeller.

3. This type of engine contains propellant c. turboprop engine

components within the vehicle itself.

4. In this type of engine a piston and d. turbofan engine

connecting rods drive a rotating

crankshaft.

5. In this type of engine heated air is e. internal combustion engine

ejected with a high velocity producing

thrust.

6. This type of engine combines the f. rocket engine

turbine and the fan.

5. Explain the terms in your own words.

Supersonic speed, excessive heat, heat exchanger, vacuum, cooling system.

6. Answer the following questions.

1. What is the most essential part of any airplane?

2. Why were the piston engines almost exclusively used for the first forty years of

powered flight?

3. What engines does the term “internal combustion engine” refer to?

4. What is the jet propulsion device?

5. What device can provide interplanetary travel?

6. What is the main limitation for interplanetary travel?

7. What are the main problems connected with using of atomic energy as a source of

power?

Vocabulary Focus

1. Match words in a with words b to form the word combinations.

A B

maintain speed

jet engine

exhaust vehicle

interplanetary rod

shielding reaction

operating flight

sonic principle

connecting mass

chemical material

reliable propulsion