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Questions
You May Have - Language Arts, Writing - Social
Studies - Science |
Science |
The Science Test consists of 50 multiple-choice questions in the following content areas:
Test questions require you to understand, interpret, or apply information that is provided on the test or that is learned through life experience. The information may be a paragraph, chart, table, graph, map,or figure. SAMPLE QUESTIONS Directions: Choose the one best answer to each questions. 1. The closer we get to Earth's surface, the stronger the force of Earth's gravity becomes. This force of gravity (measured in Newtons, or N) has a much stronger effect on an individual on Earth's surface than on someone who is thousands of kilometers above Earth's atmosphere. (Note: One kilometer equals 0.6 mile.) Which of the following statements best describes the force of gravity's effect on an astronaut floating more than 30,000 kilometers above Earth's surface? Gravity's effect (1) is the same as on Earth's
surface Answer: 2 The force of Earth's gravity lessens rapidly as an object (for example, an astronaut) gets farther from Earth's center. This force of gravity is not affected significantly by weather conditions or the astronaut's physical characteristics or occupation. 2. Clay soil forms a fairly effective barrier against the movements of water. lt also swells and shrinks significantly as its water content changes. Sandy soil, in contrast, allow water to move freely and does not change shape as the water content varies. In, which statement is the appropriate soil selected for its intended site? (1) Sandy soil would make a
good lining for a toxic waste site. Answer: 4 Clay soil absorbs and holds more water than sandy soil. Its ability to swell or shrink as the water content changes should help to maintain the pond by retaining more water. Because of its shifting characteristics, clay soil would not be a good choice for building a stable foundation. 3. The root hair of a plant, shown in the diagram below, is the most efficient way for the plant to absorb water from surrounding soil. At what point is the flow of water the GREATEST? (1) C to B
Answer: 4 In osmosis, water flows through a cell membrane in the direction of a higher concentration of water molecules to a lower concentration. In this example, the highest initial concentration of water molecules is located in area A, the soil, and the lowest concentration of water molecules is found in area B--the large root hair. The process of osmosis will continue from area A to B until the concentration of water molecules is balanced between the root hair and the soil. 4. A cook decides to recover some table salt that has been completely dissolved in water. Which of the following processes would be the most effective method of extracting salt from the solution? (1) spinning the solution in
a mixer Answer: 2 In a salt solution, microscopic particles of salt will pass through either a cloth or paper filter and will be unaffected by bubbling or spinning in a mixer, making (1), (3), (4), and (5) incorrect. Only (2)--boiling the water--will leave a salty residue on the original container. 5. A large fiberglass tank was placed in pit, as shown below. Before pipes could be attached and the tank filled with gasoline, however, the workers were asked to move the heavy tank to another location. Which of the following methods would be the best way to raise the tank off the bottom of the pit so that cables could be placed under the tank? (1) Fill the tank with gasoline. Answer: 3 To be buoyant, an object must displace an amount of liquid at least equal to its weight. Any action that makes the tank heavier than the weight of the liquid it displaces will prevent the tank from floating. All the alternatives except (3) will make the tank heavier than the weight of the liquid displaced. Therefore, only (3) will allow the tank to float off the bottom of the pit. 6. Viscosity is a measure of the internal resistance of a fluid to flow. For example, motor oil is more viscous than water. The viscosity of a fluid will change with temperature. The graph below illustrates how the viscosity of oil changes with. temperature. Under which situation will the viscosity of the oil increase? (1) as temperature decreases Answer: 1 The viscosity of a liquid--its internal resistance to flow--is closely related to its temperature. As a liquid's temperature decreases, and it gets colder, the viscosity of that liquid will increase. Only alternative (1) mentions temperature as a factor. |
Hints for Science Read the questions carefully, not only for what is stated explicitly, but also for what may be implied or assumed. Sometime, written text and diagrams have unstated assumptions about what you already know. Make sure to read all titles, keys, labels, etc. on diagrams, mapsm graphs, and tables. They often contain information about the main idea. Make sure you understand the scales of a graph because some graphs show relationships - not specific amounts. Bar graphs are often used to compare amounts. |
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