What was the error in the design of their experiment? The chart provided shows the procedures that they followed for each of the batches. At that point they decided to run an experiment with 3 batches of coffee, in an effort to find the amount of pressure that produces the best tasting coffee. As they tried out this new idea, they found out that the pressure of the nitrous gas had a dramatic effect on the flavor of the coffee. One coffee house came up with the idea of injecting nitrous gas into the cold brewed coffee, thinking that it might improve the taste.

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It is typically made by mixing fresh ground coffee with cold water and letting it brew for 12 to 24 hours. Renewable energy resources such as wind, solar, and water must emit more CO² than the processing of coal.Ĭold brew coffee is one of the fastest growing trends in coffee houses across the USA.The processing of coal must not be the primary contributor to coal emissions in the US.Therefore, CO² emissions have steadily increased. Although the percentage of total energy derived from coal decreased annually from 1990–2010, the demand for energy decreased at a rate greater than can be equilibrated with the increase in percent of coal energy.Although the percentage of total energy derived from coal decreased annually from 1990–2010, the demand for energy in the US increased at a rate greater than can be equilibrated with the decrease in percent of coal energy.Given that the processing of coal is the primary contributor to CO 2 emissions in the US, which of the following statements may explain the trend shown in the data table? The table provided suggests that decreasing the percentage of coal used for energy annually correlates with an increase in CO 2 emissions. “Long-term experiments have provided some of the best data on how various practices affect soil properties essential to sustainability.”.“This includes too much tillage that can lead to erosion, as well as irrigation without adequate drainage (leading to salinization).”.“Unsustainable agriculture involves practices that can cause long-term damage to soil over time.”.“Sustainable agriculture is the act of farming using principles of ecology, the study of relationships between organisms and their environment.”.Which sentence from the paragraph supports the idea that specific farming techniques used by humans are responsible for the environmental damage caused by unsustainable agriculture? Of the four, water and soil quality and quantity are most amenable to human intervention through time and labor. The most important factors for an individual farm are sun, air, soil, nutrients and water. In the United States, the USDA-Natural Resources Conservation Service specializes in providing technical and financial assistance for those interested in pursuing natural resource conservation and production agriculture as compatible goals. Long-term experiments have provided some of the best data on how various practices affect soil properties essential to sustainability. This includes too much tillage that can lead to erosion, as well as irrigation without adequate drainage (leading to salinization).

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Unsustainable agriculture involves practices that can cause long-term damage to soil over time. Sustainable agriculture is the act of farming using principles of ecology, the study of relationships between organisms and their environment. She should have had a control group that did not do meditation.She should not have used a survey to measure happiness levels.She should not have stopped the experiment after 14 days.She should have had another group that did 15 minutes of meditation.Based on the results of this experiment, she concluded that doing 14 days of mediation does not make students happier.Īfter Mia presented the results to her class, her teacher told her that she made an error in designing her experiment.

The survey results showed both groups at very similar happiness levels, with Group #1 registering slightly more happiness. After the fourteenth day she gave the 40 students a survey that is designed to measure happiness levels. She asked Group #1 to do the 5 minute meditation and asked Group #2 to do the 10 minute meditation. She asked each group to use the app once a day for 14 days. She divided the 40 students into 2 groups of 20. She provided each of these students with an app that guides users through a 5, 10, or 15 minute meditation. To test her hypothesis she did an experiment with 40 students from her class. Mia believed that meditating for 14 days in a row would make students happier.

Ged math practice test