Ques:Answer the following question given this paragraph: Electric substations have several functions. Many substations distribute electricity from a few high-voltage lines to several lower-voltage lines. They have electric transformers, which use electromagnetic induction to change the voltage of the current. Some transformers increase the voltage; others decrease the voltage. In the Figure below , you can see how both types of transformers are used in an electrical grid. Q: Electric substations have what devices, which use electromagnetic induction to increase or decrease the voltage of the current? Choices: - transistors - generators - tubes - transformers A:

Ans:transformers
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Ques:Answer the following question given this paragraph: Vesicles are much smaller than vacuoles and have a variety of functions. Some vesicles pinch off from the membranes of the endoplasmic reticulum and Golgi apparatus. These vesicles store and transport proteins and lipids. Other vesicles are used as chambers for biochemical reactions. Q: Are vesicles larger or smaller than vacuoles? Choices: - larger - narrower - wider - smaller A:

Ans:smaller
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Ques:Answer the following question given this paragraph: Temperature decreases in the mesosphere with altitude. This is because the heat source is the stratosphere. Q: What part of the atmosphere is the heat source? Choices: - troposphere - magnetosphere - ionosphere - stratosphere A:

Ans:stratosphere
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Ques:Answer the following question given this paragraph: The number of moles of carbon dioxide gas is first calculated by stoichiometry. Then the ideal gas law is used to calculate the volume of CO 2 produced. Q: How are the number of moles of carbon dioxide gas calculated? Choices: - relativistic - casuistry - phytochemistry - stoichiometry A:

Ans:
stoichiometry
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