Unit Test — Unit test Answers

Which is a societal problem that science can best help solve?

Why do new scientific discoveries or technological developments often lead to new career opportunities?

Many kinds of data can be gathered in the study of ocean water. Predictions are based on accurate and precise scientific data. Which of these sets of data will yield the most precise data?

Mad cow disease is caused by a prion. A prion is a malformed protein that is found in the brain tissue of infected cows, and exposure can be fatal. Meat that comes in contact with infected tissue becomes contaminated with the prion. Currently, there are no treatments for prion diseases because prions are hard to target and are too similar to normal proteins. To prevent the disease, scientists would most likely recommend that

A hypothesis must be

There is little sunlight at high latitudes during the winter, so few crops can grow even if temperatures are regulated. To address this problem, special lamps can be used in greenhouses. These lamps allow plants to grow during the winter months. Scientific knowledge of which topic was necessary to solve this problem?

Two scientists write a paper detailing their research and conclusions and submit it to a scientific journal. Several months later, the publisher sends them back the paper. Many comments from several fellow scientists are attached. Which step will the authors of the paper most likely take next?

Which type of information is best represented by a chart?

A tobacco company funded Amelia to run experiments and publish a paper. She spent a year completing several experiments to find a way to process tobacco leaves that would be better for health. Amelia conducted controlled experiments, and her results were the same each time. When scientists began conducting peer review, several of them were concerned that the results would be biased.

A scientist designed and conducted an experiment to test a hypothesis, and then formed a conclusion from her results. Next, she collected and analyzed more data and formed another conclusion. Which statement best justifies the fact that she skipped the hypothesis and experimental design steps of the scientific method?

Cornell University recently conducted a study that estimated that honeybees pollinate more than $14 billion worth of crops each year. The study suggested that nearly seventy-five percent of all global crops that are grown for food, fiber, beverages, condiments, spices, and medicines are pollinated. Produced with the help of pollinators, agricultural products including legumes, vegetables, fruits, berries, nuts, herbs, spices, oils, seeds, grains, clover, and cotton make a significant contribution to the economy. As the human population increases, so does the demand for pollination; sadly, the honeybee population is decreasing. Within the past thirty years, parasites, predators, and disease have weakened both wild and managed populations of honeybees. In fact, around the globe, honeybees are being decimated by an epidemic known as colony collapse disorder (CCD). According to this article, who collected information to research the honeybees?

Line graphs that indicate time along the x-axis can be used to predict what would happen to dependent variables in an experiment at a later point in time

Read the passage about bird food and bird watching. Noted scientist Dr. Elsa Birde described the effect of adding a mixture of dried apples and raisins to the previous feed of sunflower seeds, millet, thistle seed, and cracked corn in bird feeders in her yard. Over three years, Dr. Birde observed that the new mixture increased the number of songbirds at her feeders, especially during the months of April and May. As she has done for several years, Dr. Birde recorded, at the same time each day, the number of birds at each of her four feeders. She noted that the third year using the mixture coincided with the largest increase. There was a twenty-five percent increase in the number of songbirds over times when this mixture was not used. Dr. Birde also noted that in the third year she used a specific ratio of the ingredients, carefully measuring, which she had not done in previous years. The third year also had a warmer than normal spring, and a construction project began in a neighborhood near Dr. Birde’s. Dr. Birde is now going to produce this formula for sale and advertise to customers that they may see the same twenty-five percent increase in songbirds at their feeders.Dr. E. Birde, Journal of Scientific Bird FeedingWhich scientific claim can be made?

Which most likely is a causal relationship?

Myra is reading an article about the success of introduced species of animals into the United States.Which person is most likely considered the authority on the subject?