Ques:Answer the following question given this paragraph: During metamorphism, a rock may change chemically. Ions move in or out of a mineral. This creates a different mineral. The new minerals that form during metamorphism are more stable in the new environment. Extreme pressure may lead to physical changes. If pressure is exerted on the rock from one direction, the rock forms layers. This is foliation . If pressure is exerted from all directions, the rock usually does not show foliation. Q: If pressure is exerted on the rock from one direction, the rock forms layers. this is called what? Choices: - protonation - stratification - sedimentation - foliation A:

Ans:foliation
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Ques:Answer the following question given this paragraph: Understand current as it passes through a series circuit. Q: What device is used to stop a current in a circuit? Choices: - a signal - a valve - a mirror - a switch A:

Ans:a switch
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Ques:Answer the following question given this paragraph: electrons, which have a negative electric charge. Q: What kind of charge do electrons have? Choices: - effective - unusual - positive - negative A:

Ans:negative
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Ques:Answer the following question given this paragraph: Electrical energy consumed can be determined by multiplying power by time . Recall the equations for mechanical and thermal energy/work . An important idea is the efficiency of an electrical device: the fraction of electrical energy consumed that goes into doing useful work , expressed as a percentage. Q: Electrical energy consumed can be expressed as the product of power multiplied by what else? Choices: - work - energy - speed - time A:

Ans:
time
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