WGU C165 Integrated Physical Sciences Pre-Assessment Questions and Answers Already Passed

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WGU C165 Integrated Physical Sciences Pre-Assessment Questions and Answers Already Passed A mathematical model is used to predict the trajectory of a bullet fired from a gun. Which discipline of p... hysical science is used to develop this model? ✔✔Physics An environmental scientist monitors pollutants in a lake. Which two disciplines of physical science does this scientist use? Choose 2 answers ✔✔1. Chemistry 2. Earth science Which study involves both Earth science and physics? ✔✔Calculating how much energy is associated with a hurricane Which question could be answered with a controlled experiment? ✔✔Does ice melt faster in an empty glass or in a glass full of water? Which topic would be appropriate for a controlled experiment? ✔✔Determining how fast different chemical pollutants dissolve in water Which question requires a controlled experiment to answer? ✔✔Which elements are found in Earth's atmosphere? Sir Isaac Newton discovered that the force of gravity between two masses increases if the masses increase, and decreases if the distance between the masses increases. No experiments have ever contradicted this relationship. Which type of scientific statement is this? ✔✔Law The well-accepted scientific explanation for many characteristics of Earth's crust states that the crust is broken into several large plates. These plates move slowly over the mantle below because of convection and other processes. Earthquakes and volcanoes are most common at places where the plates interact. Evidence from physics, chemistry, and geology supports this explanation. Which type of scientific idea is this explanation an example of? ✔✔Theory A student proposes that sugar will dissolve faster in rubbing alcohol than in water. The student reasons that sugar and rubbing alcohol both contain carbon so they will mix more easily. Which type of scientific idea is the student's proposal an example of? ✔✔Hypothesis Why was the shrinking Earth idea replaced by the theory of plate tectonics? ✔✔Plate tectonics explained observations about Earth that the shrinking Earth idea could not explain. Astronomers have long accepted that plate tectonics exists nowhere in our solar system except on Earth. In 2011, a scientist analyzed 100 NASA-space-mission photographs of Valles Marineris on Mars, the longest known series of canyons in the solar system. The scientist found that Valles Marineris showed features found only in locations on Earth where major tectonic plates divide. What would be the appropriate response of scientists to this information? ✔✔Carry out further research to gain more understanding of possible plate tectonics on Mars According to the theory of plate tectonics, volcanoes are especially likely to form along plate boundaries because of rising magma. New satellite data mapping the ocean floor reveals thousands of seamounts, which are small volcanoes. Some of the seamounts are in lines that could correspond to past or present plate boundaries, but many are not aligned in this way. How should scientists appropriately respond to the idea that some new mechanism of forming the volcanoes is involved? ✔✔Carry out more research to understand better how the seamounts form For many decades, scientists thought they understood how ozone breaks down in the stratosphere, creating ozone holes. However, new data show significantly lower reaction rates than can be explained by the long-held model. What is the appropriate scientific approach for dealing with this contradiction? ✔✔Conduct additional experiments to confirm the new data For almost 1500 years most scientists in Europe accepted Ptolemy's geocentric planetary model that suggested the sun revolved around Earth. By the eighteenth century, most scientists supported a heliocentric model that suggests that Earth revolves around the sun. What is an appropriate scientific basis for this change in view? ✔✔The existing theory was changed to account for new data A woman does pushups by lowering her body to the floor using her arms and then pressing against the floor with her hands to push herself back up. [Show More]

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