| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
Absolute zero is which of the following?
the freezing point of hydrogen |
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the coldest temperature possible in the universe |
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the freezing point of oxygen |
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0°C |
In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.
"For every action, there is an equal and opposite reaction." This describes which of Newton's laws of motion?
second |
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third |
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first |
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fourth |
Newton's third law of motion states that For every action, there is an equal and opposite reaction. When an object exerts a force on another object, the second object exerts a force of equal magnitude in the opposite direction on the first object.
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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radiation |
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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.
Menstruation occurs when:
the fetus is formed |
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the ovum becomes fertilized |
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the ovum fails to become fertilized |
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the zygote is formed |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
Minerals, vitamins, and fiber are:
macronutrients |
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micronutrients |
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carbohydrates |
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proteins |
Minterals, vitamins, and fiber are micronutrients while proteins, carbohydrates, and fats are macronutrients.