Answer the following question given this paragraph: Water erosion by runoff, rivers, and streams dissolves carbon in rocks and carries it to the ocean. Ocean water near the surface dissolves carbon dioxide from the atmosphere. Dissolved carbon may be stored in the deep ocean for thousands of years. Q: How many years can dissolved carbon be stored in the deep ocean? Choices: - unknown - hundreds - tens - thousands A:
thousands
Answer the following question given this paragraph: Figure 6.11 The frictional force supplies the centripetal force and is numerically equal to it. Centripetal force is perpendicular to velocity and causes uniform circular motion. The larger the F c , the smaller the radius of curvature r and the sharper the curve. The second curve has the same v , but a larger. Q: What force is perpendicular to velocity and causes uniform circular motion? Choices: - centripetal torque - circular friction - tangential force - centripetal force A:
centripetal force
Q: Answer the following question given this paragraph: Given the mass and speed of an object, calculate its kinetic energy. Q: What can be calculated given the mass and speed of an object? Choices: - harmonic energy - residual energy - systematic energy - kinetic energy A:
A: kinetic energy
Question: Answer the following question given this paragraph: A pulley is a simple machine that consists of a rope and grooved wheel. The rope fits into the groove in the wheel, and pulling on the rope turns the wheel. Pulleys are generally used to lift objects, especially heavy objects. The object lifted by a pulley is called the load. The force applied to the pulley is called the effort. Q: Pulleys are generally used to do what with objects? Choices: - wrap - clean - pack - lift A:
Answer: lift
*Question*
Answer the following question given this paragraph: Although the speed of light is constant in a vacuum, light travels at different speeds in different kinds of matter. For example, light travels more slowly in glass than in air. Therefore, when light passes from air to glass, it slows down. If light strikes a sheet of glass straight on, or perpendicular to the glass, it slows down but passes straight through. However, if light enters the glass at an angle other than 90, the wave refracts, or bends. This is illustrated in Figure below . How much light bends when it enters a new medium depends on how much it changes speed. The greater the change in speed, the more light bends. Q: While light travels at different speeds in different kinds of matter, the speed of light is constant in what condition? Choices: - outer space - through glass - under water - vacuum A:
**Answer**
vacuum
(Q).
Answer the following question given this paragraph: Igneous rocks are classified by composition and texture. The composition can be felsic, intermediate, mafic, or ultramafic. The composition depends on the minerals the rock includes. A felsic rock will contain felsic minerals. Q: Felsic, intermediate, mafic, and ultramafic are types of composition of what rock group? Choices: - Sedimentary - asteroids - metamorphic - igneous A:
(A).
igneous