| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
The transfer of heat by the circulation or movement of the heated parts of a liquid or gas is called:
radiation |
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diffusion |
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conduction |
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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.
In the metric system, what prefix represents 10-3?
centi |
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kilo |
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milli |
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mega |
In the metric system, milli is the prefix for 10-3.
Which of the following represents the largest value?
1 cL |
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1 ML |
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1 mL |
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1 kL |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.
In fermentation, what replaces oxygen in anaerobic respiration?
starches |
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lactic acid or alcohol |
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water |
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ascorbic acid or peptides |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = { \vec{d} \over t } \) |
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none of these |
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\(\vec{v} = \vec{d}t \) |
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\(\vec{v} = { t \over \vec{d} } \) |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)