| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
radiation |
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conduction |
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convection |
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reflection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Scalar quantities are fully described by which of the following?
a magnitude only |
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a magnitude and a direction |
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a direction only |
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a magnitude and a polarity |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
arthropod |
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vertebrate |
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spiny |
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sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
What part of the brain is responsible for for balance, movement, and muscle coordination?
medulla |
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cerebellum |
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cerebrum |
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brainstem |
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 is not part of the carbon cycle?
decomposition |
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respiration |
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photosynthesis |
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precipitation |
The carbon cycle represents the ciruit of carbon through Earth's ecosystem. Carbon dioxide (CO2) in the atmosphere is absorbed by plants through photosynthesis. Plants then die and release carbon back into the atmosphere during decomposition or are eaten by animals who breathe (respiration) the carbon into the atmosphere they exhale and produce waste which also releases carbon as it decays.