Energy (Answers Key)

Passage
1. b 2. d

Homework I
1. convey 2. source 3. permeated 4. combustion 5. triggered

HomeworkII
1. b 2. c 3. e 4. a 5. d

Interesting Vocab (Energy)

Vocabularies and Definitions

1. combustion
n. The process of burning

2. component
n. One part of a system or whole

3. convey
v. To transport from one place to another;to transmit or make known

4. discretely
adv. Separately;distinctly

5. nucleus
n. A central or essential part around which other parts are gathered;a core

6. permeate
v. To spread or flow throughout;to pass through or penetrate

7. rotate
v. To turn around;to take turns in sequence

8. solar
adj. Of,or relating to,the sun

9. source
n. The point of origin or creation

10. trigger
v. To set off or initiate
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TOEFL Prep I Complete each sentence by filling in the blank with the best word from the list.Change the form of the word if necessary. Use each word only once.

combustion // convey // permeate // source // trigger

1. It is often difficult to __________ the meaning of a poem to a large audience.

2. The __________ of the gossip was someone inside this office.

3. Her bad mood that day __________ the atmosphere in the laboratory.

4. The internal __________ engine revolutionized the way automobiles run.

5. A cigarette __________ the explosion.

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Homework II : Find the word or phrase that is closest in meaning to each word in the left-hand column.

1. rotate
2. solar
3. component
4. discretely
5. nucleus


(a)separately, as an individual part
(b)spin on an axis
(c)sun
(d)center
(e)part

Energy

Most of the electricity in the United States is produced in steam turbines.There are many discrete steps in this process.

In a steam turbine,combustion of coal, petroleum,or natural gas heats water to make steam. The steam rotates a shaft that is connected to a generator that produces and electricity.

Finally,that electricity is converted by a transformer conveyed from the turbine to its place of use. Many sources can provide energy to heat the water in a steam turbine.

Coal is primary,producing 51 percent of the countryis electricity.Another common way to heat water for steam turbines is through nuclear power.In nuclear fission,atoms of uranium fuel are hit by neutrons,triggeringa continuous chain of fission that releases heat.

In 2001,nuclear power generated 21 percent of the electricity in the United States.
Solarpower produces less than 1 percent of the United Statesielectricity needs, because it is not regularly available and harnessing it is more expensive than using fossil fuels.Dependence on electricity permeates daily life in the United States. Still, few people are aware of the many components of electricity production.

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Read above passage and answer questions below here:

1. What does the author say about solar power?

a. It produces more electricity than any other source.
b. It is a relatively small source of energy for heating water in steam turbines.
c. Electricity producers are trying to use it more regularly.
d. Researchers are trying to make it cheaper to use.

2. In the passage,the word transformer probably refers to a ........

a. truck
b. generator that produces electricity
c. type of turbine
d. device that changes electric currents

Computor (Answers Key)

Reading Passage: 1. d 2. a

Homework 1: 1. a 2. c 3. c

Homework 2: 1. circulate 2. installation 3. expeditiously 4. detection 5. corrode

Interesting Vocab (Computer)

Vocabularies with theirs explanations

1. circulate
v. To move throughout an area or group;to move along a somewhat circular route

2. corrode
v. To be slowly weakened by chemical reactions

3. derive
v. To come from,usually through a long,slow process

4. detection
n. Discovering something that cannot easily be found

5. expeditiously
adv. Quickly and efficiently

6. implement
v. To make use of;to carry out

7. innovative
adj. Ahead of the times;novel

8. installation
n. Setting something into position for use

9. maintenance
n. The act of keeping something in good condition

10. simulation
n. An imitation or representation

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HOMEWORK 1: Circle the most likely meaning of the word part that is shared within each set of words.

1.circulate,circumnavigate,circuit

The root "circ / circum" probably means ...

a. around
b. broken
c. fair
d. straight


2. innovative,novel,renovate

The root "nov" probably means ...

a. clear
b. old
c. new
d. sweet

3. installation,implement,imprison

The prefix "in-/im-" probably means ...

a. aside
b. behind
c. in
d. out

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HOMEWORK 2:Circle the word that best completes each sentence.

1.Please make sure this information (circulates / derives) throughout the office quickly.

2.The (installation / simulation) of the new telephones took three days.

3.In order to stay on schedule,we need to complete this project as (expeditiously / innovatively) as possible.

4.The smuggler moved cautiously through the airport to avoid(detection/maintenance).

5.Years of neglect had caused the buildingis water pipes to (corrode / implement).