Self-Paced Online LSAT Prep Course
Learn everything there is to know about the LSAT directly from Robin Singh, the man with a world-record 12 perfect LSAT scores! You’ll have on-demand access to 80 hours of professionally-filmed LSAT prep videos that feature Robin teaching in live class settings.
- There are no talking heads or floating cursors in our videos—with every student miked up, you’ll feel like you are there.
- Ideal for those with busy or unpredictable schedules, our self-paced LSAT preparation course gives you the flexibility to learn at your convenience and the structure to guide you through the process.
- Whether you need help with a specific LSAT question or advice on how to study, our Academic Support team is always ready to answer any questions you have.
- You’ll have access to all of our extensive LSAT preparation resources, which include over 7500 official LSAT questions, thousands of video and written explanations, numerous drills and quizzes, and detailed score reports.
Cost: $1275*
What Our Students Say
Sample Videos
Feeling Lucky
For consumers, the most enjoyable emotional experience garnered from shopping is feeling lucky. Retailers use this fact to their advantage, but too often they resort to using advertised price cuts to promote their wares. Promotions of this sort might make bargain-minded consumers feel lucky, but they cut into profit margins and undermine customer loyalty.
Which one of the following most accurately describes the overall conclusion drawn in the argument?
Feeling lucky is the most enjoyable emotional experience garnered from shopping.
Retailers take advantage of the fact that shoppers enjoy feeling lucky.
Advertised price cuts are overused as a means of gaining retail sales.
Using advertised price cuts to promote retail products reduces profit margins and undermines customer loyalty.
Making consumers feel lucky is usually not a good formula for retail success.
The Minsk Hypothesis
A large survey of scientists found that almost all accept Wang’s Law, and almost all know the results of the Brown-Eisler Experiment. But those results together with Wang’s Law contradict the Minsk Hypothesis. Therefore, most of the scientists surveyed reject the Minsk Hypothesis.
The argument requires assuming which one of the following?
The scientists surveyed are generally aware that the results of the Brown-Eisler Experiment together with Wang’s Law contradict the Minsk Hypothesis.
The scientists in the survey who know the results of the Brown-Eisler Experiment are exactly the same ones who accept Wang’s Law.
Almost all of the scientists surveyed are familiar with the way in which the results of the Brown-Eisler Experiment were obtained.
The sample is large enough to be representative of scientists in the field.
Wang’s Law has in fact been shown to be true.
The Ozone Layer
By 1970 it was well established that ultraviolet light from the sun contributes to skin cancer. Fortunately, much of the sun’s most damaging ultraviolet radiation is screened out by a thin, diffuse layer of ozone—a toxic form of oxygen—in the stratosphere, 10 to 25 miles above the earth’s surface.
During the 1970s, however, public policy makers worldwide were alerted to the fragility of the ozone layer through the pioneering research and advocacy of two Nobel prize-winning scientists, Mario Molina and F. Sherwood Rowland. In the absence of pollutants, stratospheric ozone concentrations should remain stable over time, with natural production and destruction of the gas in rough equilibrium. Molina and Rowland showed how manufactured chlorofluorocarbons (CFCs)—highly volatile chemicals, millions of tons of which had been used each year in products such as aerosol sprays and refrigerants—chemically attack and deplete the ozone layer, diminishing its effectiveness as a shield against ultraviolet radiation. Studying two freon gases—types of CFCs—they observed that, when released into the lower atmosphere (troposphere), these gases slowly diffuse upward into the stratosphere. There, subjected to massive ultraviolet radiation, they break down into their constituent elements, including chlorine. The resulting increase in the concentration of chlorine in the stratosphere is devastating to the ozone layer. Chlorine and ozone chemically react in a way that both destroys the ozone and regenerates the chlorine atoms. As a result of this chemical reaction, each chlorine atom could destroy as many as 100,000 ozone molecules before becoming inactive.
In 1974 the two scientists estimated that the atmosphere contained the accumulation of five years of global CFC production. This meant that, given the rate of diffusion and breakdown of CFCs in the atmosphere, the depletion of the ozone layer would continue for years, if not decades, even if the production and use of CFCs were to cease immediately. Recognizing this as a pressing environmental threat, Molina and Rowland became public advocates for a prompt and proportionate public policy response. As a result, Molina was invited to testify before the U.S. Congress and was later appointed to the U.S. National Science Foundation Committee on Fluorocarbon Technology Assessment.
Predictably, the work of Molina and Rowland and their advocacy of dramatic policy changes were subjected to attacks by critics, especially scientists with ties to the CFC industry. However, over time their views were corroborated, especially by the discovery of a hole in the ozone layer over Antarctica, and this led to the development of an international agreement (the Montreal Protocol of 1987) to ban the production of ozone-depleting gases. In North America, CFCs were banned in the late 1970s, leading to a transformation in packaging for consumer spray products and the development of more environmentally friendly refrigerant chemicals.
The information in the passage most helps to answer which one of the following questions?
What laboratory experiments were conducted by Molina or Rowland in their research on CFCs?
What was the estimated concentration of CFCs in the atmosphere in 1987?
In what year did Molina testify before the U.S. Congress?
Does any chemical that does not contain chlorine contribute to the destruction of ozone molecules?
Which constituent element of CFCs is most damaging to ozone?
Which one of the following, if true, would most strengthen the conclusions of Molina and Rowland concerning the long-term effects of CFCs in the stratosphere?
The hole in the ozone layer over Antarctica continued to grow for years after CFC emissions had almost ceased.
Other manufactured chemicals have been found to diffuse upward into the stratosphere when released into the troposphere.
Ozone has been shown to react more violently with chlorine than with many other chemicals.
Many scientists who in the 1970s were highly critical of the research methods of Molina and Rowland have come to accept the soundness of their methods.
Current CFC levels in the troposphere suggest that not all nations currently abide by the Montreal Protocol.
Which one of the following statements is most strongly supported by the information in the passage?
Little or no ozone destruction occurs naturally in the stratosphere unless chlorine is present.
Skin cancers occur primarily because of excessive absorption of ultraviolet light.
Few chemicals besides CFCs can result in the release of chlorine in the upper atmosphere.
Regulating the use of CFCs contributes indirectly to lowering the incidence of skin cancer.
The upward flow of CFCs into the stratosphere occurs mainly in Antarctica.
Based on the passage, the information yielded by which one of the following experiments would be most useful in determining whether a particular chemical could replace CFCs without damaging the ozone layer?
testing to see whether the chemical is capable of reacting with forms of oxygen other than ozone
testing to see whether the chemical, when released into the lower atmosphere, would react with other chemicals commonly found there
testing the chemical to determine whether it would chemically react with chlorine
testing to see what chemical properties the chemical or its constituent elements share with chlorine
testing the chemical to see if it would break down into its components when subjected to ultraviolet radiation
Which one of the following statements is most strongly supported by the information in the passage?
No refrigerant chemicals other than CFCs had been discovered when Molina and Rowland suggested that CFC production cease.
Refrigerant chemicals developed as substitutes for CFCs after 1987 release fewer chlorine atoms into the stratosphere than CFCs do.
CFCs were originally used in refrigeration components because they provided the most energy-efficient means of refrigeration.
The Montreal protocol led to the cessation of CFC production in North America.
Some of the refrigerant chemicals being manufactured today contain chemicals known to be environmentally damaging.