Your Results | Global Average | |
---|---|---|
Questions | 5 | 5 |
Correct | 0 | 3.12 |
Score | 0% | 62% |
The transfer of heat by the circulation or movement of the heated parts of a liquid or gas is called:
diffusion |
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conduction |
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radiation |
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convection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas. Examples of heat transfer by convection include water coming to a boil on a stove, ice melting, and steam from a cup of coffee.
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
neutron |
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proton |
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electron |
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atom |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
Poor balance could indicate an issue with which part of the nervous system?
cerebrum |
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spinal cord |
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cerebellum |
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medulla |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
Which of the following does not represent the freezing point of water?
273K |
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0°C |
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0°F |
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32°F |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.
Which of the following would be used in eye glasses to correct nearsightedness?
convex lens |
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convex mirror |
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concave lens |
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concave mirror |
Unlike curved mirrors that operate on the principle of reflection, lenses utilize refraction. A convex lens is thicker in the middle than on the edges and converges light while a concave lens is thicker on the edges than in the middle and diffuses light. A common use for curved lenses is in eye glasses where a convex lens is used to correct farsightedness and a concave lens is used to correct nearsightedness.