The reading passage describes Hydropower facility which consists of a plant and a reservoir. The passage describes hydropower as a convenient source of energy. But the professor of the ecology class casts a doubt on this description of the hydro-power.
As the passage sites hydro-power as a convenient and environment-friendly source, the professor explains that water stored in dam may give rise to a situation such as flood. The flood may cause harm to the communities residing near the dam due to its adverse effects. The floods lead up to the accumulations of silts and toxic materials, which may produce toxic fumes. Thus by explaining it as not an environment-friendly source, the professor casts a doubt on the reading context.
He also gives example of the harm it may cause to the ecosystem near the reservoir. As the water evaporates, it cause decrease in the water level. This can cause the birds to have lesser insects as a part of their food. Fishes require a steady flow of water to sustain their life, the reservoir for the hydro-power plant, stops the steady flow of water, causing disturbance in the aquatic Ecosystem. This is another example by the professor; to cast a doubt on the fact that hydro-power is an environment-friendly source.
The professor even disagrees to the fact that hydro-power is relatively inexpensive. He states that the plant set up comes with a huge cost, making it rather expensive. He also argues that water may not be considered as a renewable source as it is dependent on various factors viz. natural conditions, etc.
To summarize up, the professor sites various examples to prove his reasons worthy to cast a doubt on the context given in the reading passage.
- "Of the two leading real estate firms in our town—Adams Realty and Fitch Realty—Adams Realty is clearly superior. Adams has 40 real estate agents; in contrast, Fitch has 25, many of whom work only part-time. Moreover, Adams' revenue last year was twice as 83
- As people rely more and more on technology to solve problems, the ability of humans to think for themselves will surely deteriorate. 75
- Your school has enough money to purchase either computers for students or books for the library. Which should your school choose to buy — computers or books? Use specific reasons and examples to support your recommendation. 80
- Argument Topic In order to reverse the recent decline in our profits we must reduce operating expenses at Movies Galore s ten video rental stores Since we are famous for our special bargains raising our rental prices is not a viable way to improve profits 79
- The following argument was made in a newspaper editorial:“The autonomy of any country is based on the strength of its borders; if the number of illegal immigrants entering a country cannot be checked, both its economy and national identity are endangere 89
Don't need a conclusion paragraph.
better to have 4 paragraphs:
para 1: introduction
para 2: doubt 1
para 3: doubt 2
para 4: doubt 3
Read sample essays from ETS:
http://www.testbig.com/users/toeflwritingmaster
flaws:
Don't repeat words or phrases like 'cast doubts'
Attribute Value Ideal
Score: 23 in 30
Category: Good Excellent
No. of Grammatical Errors: 0 2
No. of Spelling Errors: 0 2
No. of Sentences: 16 12
No. of Words: 288 250
No. of Characters: 1392 1200
No. of Different Words: 135 150
Fourth Root of Number of Words: 4.12 4.2
Average Word Length: 4.833 4.6
Word Length SD: 3.093 2.4
No. of Words greater than 5 chars: 91 80
No. of Words greater than 6 chars: 74 60
No. of Words greater than 7 chars: 48 40
No. of Words greater than 8 chars: 42 20
Use of Passive Voice (%): 0 0
Avg. Sentence Length: 18 21.0
Sentence Length SD: 5.579 7.5
Use of Discourse Markers (%): 0.438 0.12
Sentence-Text Coherence: 0.346 0.35
Sentence-Para Coherence: 0.571 0.50
Sentence-Sentence Coherence: 0.122 0.07
Number of Paragraphs: 5 4