Harnessing the Power of Ocean Waves
1. “Water is currently the leading renewable energy source used by electric utilities to
generate electric power.â€
Energy Information Administration (EIA)
2. A predominant source of hydroelectric power is moving water-the water that runs in rivers, streams, and other waterways. The moving water turns turbines, which can resemble large propellers or fan blades. As a turbine spins, an axle at its center also spins. Machines then use this constant spinning motion to convert the energy of the moving water into electricity. On a larger scale, the world's oceans are also moving-in currents throughout these vast bodies of water, and as waves along hundreds of thousands of miles of coastline. As with land-based waterways, the power of ocean waves could be used to produce electricity. Currently, the technology exists to meet a significant portion of the world's energy demands by converting wave power to electricity.
Methods for Capturing Wave Power
3. There are several types of devices used to capture ocean wave power, such as point absorbers, terminators (also called oscillating water columns'), and attenuators? (see Table 1). Additionally, there are several methods and locations of deployment for these devices, including fixed and floating, and onshore, near shore, and offshore. Together, the wave-capturing device, the deployment method, and the deployment location determine the amount of energy captured and available for conversion into electricity. See Table 1 for examples of wave-capturing devices, deployment methods, and deployment locations.
Advantages and Disadvantages
4. As with any technology that converts our world's resources to energy, there are advantages and disadvantages to using ocean wave power. Supporters of the technology point to a critical advantage-ocean wave power does not release heat-trapping gases into the atmosphere. Additionally, if ocean wave power provides a portion of the electricity currently being met by fossil fuel power, then fewer fossil fuels will be burned and, in turn, fewer heat-trapping gases will be released. Thus, ocean wave power can lead to a reduction in heat-trapping gases accumulating in the atmosphere. Proponents of using ocean waves to generate power cite another advantage: the technology does not use or waste water, but merely displaces it.
5. These arguments are countered by opponents of ocean wave power, who contend that disadvantages of using waves to generate electricity are more numerous than the advantages. They argue that the technology is likely to disrupt marine ecosystems and introduce pollutants into marine waters. Specifically, energy collection and conversion devices may disrupt migratory patterns, expose marine animals to risk of entanglement in the equipment, and repel or attract species to such a degree that ecosystems are thrown out of balance. Adversaries of the technology do not limit their argument to the environmental impact of ocean wave technology. Instead, they claim that deploying ocean wave devices could also disrupt the relationships that people have with the oceans by ruining their views of the seaside.
6. Whether one is a proponent or opponent of harnessing the ocean's wave power for our own use, it is clear that there are benefits and pitfalls to the technology. Advocates of ocean wave power argue that cleaner energy production is worth the risk of disrupting marine habitats. But people who challenge the use of ocean wave power counter that any risk to our fragile ecosystems is too much of a risk.
How does paragraph 3 function in the article?
- A. It develops the general point made in paragraph 2 by giving specific examples.
- B. It presents a counterargument to a claim made in paragraph 2.
- C. It discusses general topics that are further developed by concrete examples in paragraph 4.
- D. It provides a transition between a controversial topic begun in paragraph 2 and finished in paragraph 4.
Correct Answer & Rationale
Correct Answer: A
Paragraph 3 effectively supports the general point established in paragraph 2 by presenting specific examples that illustrate the broader claim. This approach enhances understanding by grounding abstract ideas in concrete instances. Option B is incorrect as paragraph 3 does not introduce a counterargument; rather, it reinforces the main idea. Option C misrepresents the function of paragraph 3, as it does not merely discuss general topics but rather focuses on specific examples. Option D fails to capture the essence of paragraph 3, as it does not serve primarily as a transition but as a means to elaborate on the preceding claim.
Paragraph 3 effectively supports the general point established in paragraph 2 by presenting specific examples that illustrate the broader claim. This approach enhances understanding by grounding abstract ideas in concrete instances. Option B is incorrect as paragraph 3 does not introduce a counterargument; rather, it reinforces the main idea. Option C misrepresents the function of paragraph 3, as it does not merely discuss general topics but rather focuses on specific examples. Option D fails to capture the essence of paragraph 3, as it does not serve primarily as a transition but as a means to elaborate on the preceding claim.
Other Related Questions
How does paragraph 6 fit into the problem-solution structure of the article?
- A. It introduces the problem of harboring wild animals without endangering neighbors.
- B. It provides a solution for containing debris without offending neighbors.
- C. It extends the solution for disposing of trash without spreading offensive odors.
- D. It reveals the problem of maintaining the landfill without harming the wild animals living there.
Correct Answer & Rationale
Correct Answer: B
Paragraph 6 effectively addresses a solution for containing debris, ensuring that it does not offend neighbors. This aligns with the article's problem-solution structure by directly tackling community concerns about waste management. Option A incorrectly suggests that the paragraph introduces a problem rather than a solution. Option C misidentifies the focus, as it relates to trash odors rather than debris containment. Option D also misinterprets the content, as it implies a problem regarding landfills and wildlife, which is not the focus of this paragraph. Thus, B accurately encapsulates the paragraph's role in resolving a specific issue.
Paragraph 6 effectively addresses a solution for containing debris, ensuring that it does not offend neighbors. This aligns with the article's problem-solution structure by directly tackling community concerns about waste management. Option A incorrectly suggests that the paragraph introduces a problem rather than a solution. Option C misidentifies the focus, as it relates to trash odors rather than debris containment. Option D also misinterprets the content, as it implies a problem regarding landfills and wildlife, which is not the focus of this paragraph. Thus, B accurately encapsulates the paragraph's role in resolving a specific issue.
sselect two of the four details from the excerpt into the chart to show which main idea each supports. 1. The narrator is imaginative. 2. The narrator is observant.
- A. The narrator thinks the director looks like the music.
- B. The narrator notices the candlelight reflected off the violin.
- C. The narrator stands to the side while the ladies pass by.
- D. The narrator has a new dress for the concert.
Correct Answer & Rationale
Correct Answer: A, B
Option A supports the idea that the narrator is imaginative, as it illustrates creative thinking by comparing the director's appearance to music, showcasing a unique perspective. Option B aligns with the narrator being observant, as it highlights attention to detail by noticing the candlelight's reflection on the violin, indicating a keen awareness of the surroundings. Option C does not directly demonstrate imagination or observance; instead, it shows the narrator's position without revealing insights about their thoughts or perceptions. Option D, while mentioning a new dress, does not provide evidence of either imagination or observance, focusing instead on a superficial detail unrelated to the narrator's cognitive engagement with their environment.
Option A supports the idea that the narrator is imaginative, as it illustrates creative thinking by comparing the director's appearance to music, showcasing a unique perspective. Option B aligns with the narrator being observant, as it highlights attention to detail by noticing the candlelight's reflection on the violin, indicating a keen awareness of the surroundings. Option C does not directly demonstrate imagination or observance; instead, it shows the narrator's position without revealing insights about their thoughts or perceptions. Option D, while mentioning a new dress, does not provide evidence of either imagination or observance, focusing instead on a superficial detail unrelated to the narrator's cognitive engagement with their environment.
Based on the email, which description characterizes the relationship between the profitability of the small shops near Juniper Estates and the opening of a Brannick's Superstore?
- A. The size of Brannick's would allow it to offer lower prices, possibly forcing the small shops out of business.
- B. Brannick's would attract new customers to the area, bringing business to the small shops.
- C. The small shops charge higher prices than Brannick's would, potentially allowing them to offer better wages to their workers.
- D. The small shops carry products too specialized for Brannick's, ensuring the loyalty of their customers.
Correct Answer & Rationale
Correct Answer: A
The relationship between the profitability of small shops near Juniper Estates and the opening of Brannick's Superstore is primarily characterized by competitive pricing. Brannick's larger size enables it to offer lower prices, which may drive small shops out of business due to reduced customer traffic. Option B suggests that Brannick's would attract new customers, which is unlikely to benefit small shops if they cannot compete on price. Option C incorrectly assumes that higher prices lead to better wages, which generally isn't sustainable against lower-priced competitors. Option D overlooks the impact of pricing competition, as even specialized products may not suffice to retain customers when faced with significantly lower prices from a superstore.
The relationship between the profitability of small shops near Juniper Estates and the opening of Brannick's Superstore is primarily characterized by competitive pricing. Brannick's larger size enables it to offer lower prices, which may drive small shops out of business due to reduced customer traffic. Option B suggests that Brannick's would attract new customers, which is unlikely to benefit small shops if they cannot compete on price. Option C incorrectly assumes that higher prices lead to better wages, which generally isn't sustainable against lower-priced competitors. Option D overlooks the impact of pricing competition, as even specialized products may not suffice to retain customers when faced with significantly lower prices from a superstore.
The rooms were very grand. How would the meaning of this sentence be changed if the word 'grand' were replaced with 'large'?
- A. The sentence would describe the size of the room but not their magnificence.
- B. The sentence would provide information about the historical period in which these rooms were used.
- C. The sentence would offer insight into the particular decorations of the rooms but not the dimensions.
- D. The sentence would refer to the number of people the rooms would accommodate.
Correct Answer & Rationale
Correct Answer: A
Replacing "grand" with "large" alters the focus of the description. "Grand" conveys a sense of magnificence, elegance, and impressive beauty, while "large" simply indicates size without any connotation of splendor. Thus, option A accurately reflects that the sentence shifts from describing both size and magnificence to solely addressing size. Option B incorrectly suggests a historical context, which isn't implied by either term. Option C misinterprets the focus on decorations rather than size. Option D mistakenly assumes a focus on capacity, which is not relevant to the original meaning about the rooms.
Replacing "grand" with "large" alters the focus of the description. "Grand" conveys a sense of magnificence, elegance, and impressive beauty, while "large" simply indicates size without any connotation of splendor. Thus, option A accurately reflects that the sentence shifts from describing both size and magnificence to solely addressing size. Option B incorrectly suggests a historical context, which isn't implied by either term. Option C misinterprets the focus on decorations rather than size. Option D mistakenly assumes a focus on capacity, which is not relevant to the original meaning about the rooms.