unit 8 finished (likely result & hypothetical result)

7/27/2019 Unit 8 Finished (Likely Result & Hypothetical Result)

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UNIT 8

by 5A group


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Outline

Likely or probable result

Hypothetical result


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Definite statement :

If zinc is placed in dilute hydrochloricacid, hydrogen will be evolved.

Stretching a material beyond its elasticlimit will produce a permanent

deformation of the material.


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Undefinite statement:

If the hydrogen is ignited, it is likely toexplode.

If the hydrogen is ignited, it will probablyexplode.


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pump

air under pressure

If the pressure is not reduced, the cylinder is

likely to fracture.

We can therefore state:The cylinder is likely to fracture unless the

pressure is reduced.

cylinder

air


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1. The wire is likely to melt unless the

current is reduced

2. The cylinder is likely to explode unless

the gas pressure is reduced

3. The liquid is likely to boil unless the heat

is reduced

4. The metal wire is likely to deform unless

the force is reduced


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Sometimes a certain results will only occur if

there are certain conditions.

It will only freeze if the temperature is low

enough.

We therefore state:Water will freeze provided it is cooled to a

low enough temperature.


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1. Steel will stretch provided it is subjected to a

high enough tensile force

2. Oxygen will freeze provided it is cooled to a low

enough temperature3. Helium will liquefy provided it is subjected to a

high enough pressure

4. Rubber will melt provided it is heated to a highenough temperature

5. Sulfur will vaporize provided it is heated to a

high enough temperature


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When a current is passed through a wire,

the wire becomes hot.

We can therefore state:

When a current is passed through a wire,there will be a significant heating effect

provided the current is large enough.


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1. When a metal bar is stretched, there will

be a significant extension effect provided

the force is large enough.

2. When carbon dioxide is cooled, there will

be a significant solidify effect provided the

temperature is low enough.

3. When copper is heated, there will be a

significant melting effect provided the

temperature is high enough


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4. When salt is placed in water, there will be

a significant dissolving effect provided the

water is warm enough.

5. When helium is compressed, there will be

a significant liquidize effect provided the

pressure is high enough.


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If we are certain that it will happen:

Q: if I drop this glass, will it break?

A: Yes, it will.

When we arent certain that it will happen:

Q: if this bulb is connected to the battery, willit light up?

A: Yes, itough t to/shou ld do.


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Example:

Will this piece of aluminium reflect heat?Yes, it ought to/should do. Provided its

clean


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Hypothetical result

Sometimes we want to emphasize the fact

that we are not really going to perform an

action.

For example:

If I threw a stone at the window, it wouldbreak.


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Hypothetical result

Q: What would happen if I threw a stone at

the window?A: It would break.


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Hypothetical result

1. Q: What would happen if I heat this piece

of aluminium at 1,800 oC?

A: It would melt.

2. Q: What would happen if I place this zinc

to the dilute hydrochloric acid?A: the zinc would react with acid.


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Hypothetical result

3. Q: What would happen if I stretch this

copper wire beyond its elastic limit?

A: It would undergo permanentdeformation.

4. Q: What would happen if I hold some

glass and wood together to the flame?A: The glass would melt and the wood

would burn.


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Hypothetical result

threw this stone at

the window?

bent this ruler?

stood on this pieceWhat would happen if I of chalk?

lit this piece of pa-

per?

stretched this pie-of elastic?

You can reply: The ... Would ... or It would ...


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Hypothetical result

If I placed pieces of zinc in dilute

hydrochloric acid they would react with the

acid.

We would state:

If pieces of zinc were placed in dilutehydrochloric acid they would react with the

acid.


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Hypothetical result

We sometimes want to say what we think is

likely to happen in a hypothetical situation.

We state:

If too high a current were passed through a

wire, the wire would probably melt.


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Hypothetical result

1. What do you think would happen if the

cylinder of hydrogen heated?

It would probably explode.

2. What do you think would happen if a salt

added to the water?It would probably dissolve.


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Hypothetical result

3. What do you think would happen if this

thin copper wire subjected to high tensile

force?

It would probably undergo permanent

deformation.

4. What do you think would happen if piece

of glass heated and then cooled quickly?

It would probably break.


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Hypothetical result

5. What do you think would happen if

carbon dioxide poured over fire?

It would probably form a CO2.

6. What do you think would happen if bar of

steel bent with extremely large force?

It would probably fracture.


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Hypothetical result

7. What do you think would happen if too

high current were passed through a coil?

The coil would probably to melt.

8. What do you think would happen if a

piece of wood heated to a high

temperature?

It would probably to catch light.


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Hypothetical result

The word because is followed by a sentence

and the combination due to is followed by a

noun:

I bought this bookbecauseI wanted tolearn more about computers.

Ine's failure was due toher poor studyhabits.


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Hypothetical result

As a result of refers to what happens

afterward. For example:

As a resul t ofmy going into the basement, I

am now deathly afraid of spiders.


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Hypothetical result

because

The reason is very important in the

sentence, so because comes in the second

clause of the sentence.Example: I read this bookbecauseI like it.

asThe reason is already known.

Example: Aswe read, we learn.


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Hypothetical result

since

The reason is already known.

Example:

(more formal than as) Sincewe were in thecomputer lab, our English has improved.


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Hypothetical result

Inverted tube

Liquid (mercury)

trough


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Hypothetical result

Statements with would:Adding zinc to an explosion.

hydrochloric acid

Igniting a cylinder cause corrotion.

of hydrogen result in

would

Immersing iron in bring an extension.

Water about

Pulling copper a chemical reaction.

wire hard enough


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unit 8 finished (likely result & hypothetical result)

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