- •3. Match the words or notions with their definitions.
- •2.Read and retell the text.
- •Initial Definitions
- •3. Put the sentences in the correct order according to the text.
- •4. Choose the correct answer.
- •3. Say whether the statements are true or false.
- •4.Choose the correct answer.
- •5. Answer the following questions.
- •6. Memorize the dialogues and perform them in pairs.
- •7. Now try to tell the gist of the text in 5-6 sentences. Use the questions from Ex. 5 to help you.
- •1. Memorize the following words and expressions:
- •2. Read the text, study it. Find in the text examples to illustrate difference between key notions: heat and work.
- •It is impossible to construct an engine that will work in a complete cycle and produce no other effect except the raising of a weight and the cooling of a reservoir.
- •3. You. Are to add to the diagram the necessary information.
- •4. Match the words with their definitions.
- •5. Make up sentences.
- •7. Answer the following questions.
- •8. Ask the given sentence as many questions as possible.
- •9. Translate the sentences into English.
- •1. Memorize the following words and expressions:
- •2. Read the text, study it Find in the text examples to illustrate difference between key notions: heat and work.
- •3. Complete the sentences.
- •Write down as many questions to the given sentences as possible.
- •Say if the statements are true or false;
- •Heat and work:
- •3. Try to explain the meaning of the given words using the information you’ve learnt from the text.
- •4. Solve the crossword puzzle.
- •5. Say whether the statements are true or false.
- •6. Fill in the blanks with the missing words.
- •Read the dialogues and dramatize them in pairs.
- •1. Memorize the following words and expressions:
- •2. Read and retell the text.
- •3. Answer the following questions.
- •4. Explain the difference between heating systems. Fill in the table.
- •5. Complete the following sentences using the english equivalents instead of the Ukrainian words and word-combinations.
- •1. Memorize the following words and expressions:
- •2. Read and retell the text.
- •3. Make up sentences with given words:
- •4.Complete the following sentences.
- •6. Supply questions to these sentences.
- •7. Find the Ukrainian equivalents of the given words.
- •8. Read and translate the dialogue.
- •2. Read the text. Find the difference between these two systems of ventilation.
- •Vacuum Ventilation.
- •3. Fill in the blank with the necessary words and word-combinations.
- •4. Try to retell the gist of the text in 5-7 sentences.
- •5. Explain the difference between artificial, vacuum and plenum ventilation.
- •6. Answer the questions:
- •2. Read (he text, study it. Pay attention to new words.
- •3. Answer the following questions:
- •5.Choose the correct answer:
- •6. Read and translate the dialogue..
- •1. Memorize the following words and expressions:
- •2. Read and translate the text and information in the table.
- •3 .Answer the questions:
- •4. Try to explain the meaning of the given heating methods using the information you’ve learnt from the text:
- •5. Fill in the blanks with the missing words:
- •Ventilation and water heating
- •1. Memorize the following words and expressions:
- •2. Read and translate the text.
- •Ventilation and water heating
- •7. Try to explain how building byelaws applied to ventilation.
- •1.Memorize the following words and expressions:
- •2. Read and translate the text.
- •7. Make up the plan according to the text.
- •1. Memorize the following words and expressions.
- •2. Read and translate the text.
- •3. Answer the questions :
- •4. Translate into English.
- •5. Ask 4 types of the questions to the sentence:
- •6. Fill in the gaps using the necessary words:
- •1. Read and memorize following words and expressions:
- •2. Read, translate and study the text:
- •2.Scan for the details and circle the correct letter.
- •3.Choosc the words from the box to complete sentences.
- •2. Answer the following questions:
- •3. Ask 4 types of the questions to the sentences:
- •4.Choose the words from the box to complete sentences.
- •Complete the following sentences.
- •4. Make up 5 sentences using following words:
- •5. Make up the plan according to the text, not less than 10 items.
- •6. Fill in the table . Pay attention to the types of the boilers and explain the difference between them.
- •7. Answer the questions to the text:
- •1. Read the text and try to understand the main idea:
- •3. Complete the following sentences:
- •4.Fill in the blanks with the missing words:
- •5.Choose the correct answer:
- •1.Read and translate the text.
- •2. Make the translation of Steam Turbines classifications .
- •3. Answer the questions of the text:
- •4. Is it true or false?
- •6. Make un 5 sentences with following words:
- •7.Work in pairs. Complete the dialogue.
- •7. Fill in the table.
- •1.Read and translate the text.
- •2.Make the difference between the types of the turbines.
- •3.Ask questions to the sentences.
- •4.Complete the sentences.
- •5. Agree or disagree with the statements:
- •6.Answer the following questions:
- •7. Choose the words from the box to complete sentences.
- •Unit 26
- •2. Read and translate the abstract.
- •3. Find the Ukrainian equivalents of the word-combinations:
- •4.Use the words from Ex. 3 and make up sentences with them.
- •5. Translate into English.
- •1. Read and memorize the following expressions:
- •2. Read and translate the text:
- •3. Answer the questions:
- •4. Fill in the blanks with the missing words:
- •5. Agree or disagree with the statements:
- •4.Complete the sentences. Choose the correct word from the brackets:
- •3. Give the Ukrainian equivalents:
- •4. Answer the following questions:
- •5. Translate the sentences into English:
- •Indirect systems
3. Say whether the statements are true or false.
When a substance changes from one state, or phase, of matter to another we say that it has undergone a change of state, or we say that it has undergone a change of phase.
There are five states, or phases, of matter.
Heat, which is energy, doesn't come into the material during a change of phase.
There are two types of energy - kinetic and potential.
If heat is coming into a substance during a phase change, then this energy is used to make the bonds between the molecules of the substance stronger. In the gas the molecules are strongly bonded to one another, thus forming a rigid solid.
The average speed of the molecules is the same before and after a phase change.
4.Choose the correct answer.
There are four states, or phases, of matter. They are: solid, liquid, gas and .
water
plasma
snow
When a substance changes from one state, or phase, of matter to another
we say that it , or we say that it has undergone a change of
phase.
has undergone a change of state
hasn't changed
has become worse
Heat, which is energy, either comes into the material during a change of phase or heat comes out of the material during this change. However, although the heat content of the material , the temperature does not.
remains the same
changes
grows in volume
The heat exchanges, or energy exchanges, present during a change in phase are changes in .
potential energy
kinetic energy
both
The average speed of the molecules is the same before and after a phase cnange, so, the average kinetic energy is the same. And thus, again, we stale that the temperature during a change in phase.
does not change
changes
nothing happens
5. Answer the following questions.
What does the term "change of phase'1 mean?
How many states of a matter are there?
When a substance undergoes the change of state?
What types of energy do you know?
When the bonds of molecules are broken?
What do you know about the speed of the-molecules?
6. Memorize the dialogues and perform them in pairs.
I
- What do you know about change of state of a substance?
- There are four states, or phases, of matter. They are: Solid, Liquid, Gas, Plasma.
- Suppose we add heat to the ice?
- In the ice the molecules are strongly bonded to one another, thus forming a rigid solid. When heat is added to the ice, these bonds are broken and the molecules, now at a higher potential energy state, bond to one another with less strength. Water is formed.
II
- Do you know what heat is?
- Yes, I do. It is energy.
- What is heat chiefly used for?
- When heat comes into a substance, it is used for changing the bonding between the molecules.
III
- Suppose you wanted to change the ice into water?
- To break the bonds between the molecules of the ice required energy, and this is the use for the heat.
- Quite right! Now, what is heat used for?
- It's used for changing the state of a substance.