konan
Monday, 26 May 2008
Monday, 26 May 2008
400 Must-Have Words for the TOEFL® lesson 4
LESSON4
Petroleum Alternatives
Target Words
1. constraint 6. emission
2. contamination 7. extinction
3. deplete 8. reservoir
4. dispose of 9. shrink
5. elementally 10. stable
Definitions and Samples
1. constraint n. Something that restricts thought or action
The constraints of military life kept Eileen from seeing Private Morris
more than once a month.
Parts of speech constrain v
2. contamination n. Being made less clean by a germ or hazardous substance
The contamination in the river came from the factory located just
upstream.
Parts of speech contaminate v, contaminant n
3. deplete v. To greatly decrease the supply of a resource or material
The prolonged war depleted the country’s national treasury.
Parts of speech depletion n
4
Copyright © 2005 by The McGraw-Hill Companies, Inc. Click here for terms of use.
4. dispose of v. To throw away; to get rid of; to kill
She disposed of her unwanted possessions before moving.
The tyrant cruelly disposed of all his enemies.
Usage tips Dispose of should be learned as a unit. In this meaning,
dispose does not occur without of.
Parts of speech disposal n, disposable adj
5. elementally adv. In terms of elements; basically
Elementally, coal and diamonds are the same.
Parts of speech element n, elemental adj
6. emission n. Sending out from a small space into the general environment;
a substance discharged into the air
The Environmental Protection Agency regulates the emission of
pollutants into the air.
Usage tips Emission is usually followed by an of phrase.
Parts of speech emit v
7. extinction n. Complete disappearance; the end of existence
Human beings have caused the extinction of many other species.
Usage tips Extinction implies an absolute end; an extinct thing
cannot be brought back into existence.
Parts of speech extinct adj
8. reservoir n. A place where a liquid is collected and stored
Cult members threatened to poison the town’s water reservoir.
Parts of speech reserve v
9. shrink v. To become reduced in size, amount, or value
If you dry your clothing on the “high heat” setting, they may shrink.
Parts of speech shrinkage n, shrinkable adj
18 Nature
10. stable adj. Firm and dependable; showing little change
He fell because the ladder wasn’t stable.
Parts of speech stability n, stably adv
TOEFL Prep I Find the word that is closest in meaning to the opposite
of each word in the left-hand column. Write the letter in the
blank.
1. stable (a) keep
2. contamination (b) expand
3. extinct (c) unsteady
4. dispose of (d) existing
5. shrink (e) purity
TOEFL Prep II Circle the word that best completes each sentence.
1. The (constraints / contamination) of being in prison made her hate society
even more.
2. A recognition that the Earth is round was one of the (elemental /
shrunken) advances in thought during the time period.
3. Mother Teresa, who helped the poorest of the poor, had a great
(disposal / reservoir) of love within her spirit.
4. Automobiles are responsible for some (emissions / extinction) of greenhouse
gases.
5. By the end of the storm, the hikers had (depleted / reserved) even
their emergency stores.
TOEFL Success Read the passage to review the vocabulary you
have learned. Answer the question that follows.
Human consumption of fossil fuels is expected to fully
deplete the Earth’s crude oil reserves by the year 2060.As
underground reservoirs of oil continue to shrink, we have
no choice but to find alternatives. One promising source,
with much cleaner emissions, is called bio-diesel. Bio-
Petroleum Alternatives 19
Bonus Structure—
One promising
source signals the
point of this
paragraph.
diesel is often made from soybean oil, although it can be made from any
vegetable oil that is not elementally different from soy. Bio-diesel can even
be made from used cooking oils that homes or restaurants would
otherwise dispose of. Bio-diesel can be used without constraint in any
vehicle that runs on diesel—no modifications are needed. Presently, diesel
engines can take up to 20 percent soy in their soy-diesel blend.As the need
for bio-diesel increases and the technology improves,we may soon witness
the extinction of the fossil-fueled vehicle.This is good news for the planet,
as bio-diesel is a more stable source of energy than petroleum, and it
reduces contamination of our air and water.
An introductory sentence for a brief summary of the passage is provided
below. Complete the summary by selecting the three answer choices that
express the most important ideas in the passage. In each blank, write the
letter of one of your choices.
a. Humans have shown little self-restraint in their consumption of
fossil fuels.
b. Underground reservoirs of oil will soon be depleted.
c. Bio-diesel burns cleaner than fossil fuels.
d. Bio-diesel comes from a more stable source than petroleum.
e. Restaurants can save disposal fees on used cooking oil.
Lesson 4 Petroleum Alternatives
TOEFL Prep I 1. c 2. e 3. d 4. a 5. b
TOEFL Prep II 1. constraint 2. elemental 3. reservoir 4.
emission 5. deplete
TOEFL Success a, c, d
Petroleum Alternatives
Target Words
1. constraint 6. emission
2. contamination 7. extinction
3. deplete 8. reservoir
4. dispose of 9. shrink
5. elementally 10. stable
Definitions and Samples
1. constraint n. Something that restricts thought or action
The constraints of military life kept Eileen from seeing Private Morris
more than once a month.
Parts of speech constrain v
2. contamination n. Being made less clean by a germ or hazardous substance
The contamination in the river came from the factory located just
upstream.
Parts of speech contaminate v, contaminant n
3. deplete v. To greatly decrease the supply of a resource or material
The prolonged war depleted the country’s national treasury.
Parts of speech depletion n
4
Copyright © 2005 by The McGraw-Hill Companies, Inc. Click here for terms of use.
4. dispose of v. To throw away; to get rid of; to kill
She disposed of her unwanted possessions before moving.
The tyrant cruelly disposed of all his enemies.
Usage tips Dispose of should be learned as a unit. In this meaning,
dispose does not occur without of.
Parts of speech disposal n, disposable adj
5. elementally adv. In terms of elements; basically
Elementally, coal and diamonds are the same.
Parts of speech element n, elemental adj
6. emission n. Sending out from a small space into the general environment;
a substance discharged into the air
The Environmental Protection Agency regulates the emission of
pollutants into the air.
Usage tips Emission is usually followed by an of phrase.
Parts of speech emit v
7. extinction n. Complete disappearance; the end of existence
Human beings have caused the extinction of many other species.
Usage tips Extinction implies an absolute end; an extinct thing
cannot be brought back into existence.
Parts of speech extinct adj
8. reservoir n. A place where a liquid is collected and stored
Cult members threatened to poison the town’s water reservoir.
Parts of speech reserve v
9. shrink v. To become reduced in size, amount, or value
If you dry your clothing on the “high heat” setting, they may shrink.
Parts of speech shrinkage n, shrinkable adj
18 Nature
10. stable adj. Firm and dependable; showing little change
He fell because the ladder wasn’t stable.
Parts of speech stability n, stably adv
TOEFL Prep I Find the word that is closest in meaning to the opposite
of each word in the left-hand column. Write the letter in the
blank.
1. stable (a) keep
2. contamination (b) expand
3. extinct (c) unsteady
4. dispose of (d) existing
5. shrink (e) purity
TOEFL Prep II Circle the word that best completes each sentence.
1. The (constraints / contamination) of being in prison made her hate society
even more.
2. A recognition that the Earth is round was one of the (elemental /
shrunken) advances in thought during the time period.
3. Mother Teresa, who helped the poorest of the poor, had a great
(disposal / reservoir) of love within her spirit.
4. Automobiles are responsible for some (emissions / extinction) of greenhouse
gases.
5. By the end of the storm, the hikers had (depleted / reserved) even
their emergency stores.
TOEFL Success Read the passage to review the vocabulary you
have learned. Answer the question that follows.
Human consumption of fossil fuels is expected to fully
deplete the Earth’s crude oil reserves by the year 2060.As
underground reservoirs of oil continue to shrink, we have
no choice but to find alternatives. One promising source,
with much cleaner emissions, is called bio-diesel. Bio-
Petroleum Alternatives 19
Bonus Structure—
One promising
source signals the
point of this
paragraph.
diesel is often made from soybean oil, although it can be made from any
vegetable oil that is not elementally different from soy. Bio-diesel can even
be made from used cooking oils that homes or restaurants would
otherwise dispose of. Bio-diesel can be used without constraint in any
vehicle that runs on diesel—no modifications are needed. Presently, diesel
engines can take up to 20 percent soy in their soy-diesel blend.As the need
for bio-diesel increases and the technology improves,we may soon witness
the extinction of the fossil-fueled vehicle.This is good news for the planet,
as bio-diesel is a more stable source of energy than petroleum, and it
reduces contamination of our air and water.
An introductory sentence for a brief summary of the passage is provided
below. Complete the summary by selecting the three answer choices that
express the most important ideas in the passage. In each blank, write the
letter of one of your choices.
a. Humans have shown little self-restraint in their consumption of
fossil fuels.
b. Underground reservoirs of oil will soon be depleted.
c. Bio-diesel burns cleaner than fossil fuels.
d. Bio-diesel comes from a more stable source than petroleum.
e. Restaurants can save disposal fees on used cooking oil.
Lesson 4 Petroleum Alternatives
TOEFL Prep I 1. c 2. e 3. d 4. a 5. b
TOEFL Prep II 1. constraint 2. elemental 3. reservoir 4.
emission 5. deplete
TOEFL Success a, c, d