Unit Test — Unit test Answers

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?

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

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?

The graph below shows changes in Earth’s average surface temperature since 1880.The general trend that is shown on the graph is that average surface temperature on Earth

Which most likely is a causal relationship?

Scientists must be able to repeat an experiment and get very similar results; otherwise their conclusions will be questioned. If the results of a repeated experiment are different from the original results, the results of the experiment

A scientist investigated the effects of morning temperatures on flower width. Which most likely could have been a source of error in his investigation?

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?