| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.50 |
| Score | 0% | 70% |
Which of the following states of matter exists at the highest temperature?
solid |
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gas |
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none of these |
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liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
The __________ is a system of muscles that allows breathing.
diaphragm |
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bronchioles |
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pulmonary |
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trachea |
The diaphragm is a system of muscles that allows breathing. During inhalation, the diaphragm expands and air rushes in to fill the space created. Then, during exhalation, the diaphragm contracts and forces the air back out.
Acceleration is the rate of change of velocity per unit of time. Which of these is the formula for acceleration?
\(\vec{a} = { \Delta \vec{v} \over t }\) |
|
\(\vec{a} = \Delta \vec{v} t \) |
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\(\vec{a} = { t \over \Delta \vec{v} }\) |
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\(\vec{a} = { \vec{v} \over t }\) |
Acceleration is the rate of change of velocity per unit of time. In physics, the delta symbol (\(\Delta\)) represents change so the formula for acceleration becomes \(\vec{a} = { \Delta \vec{v} \over t }\)
A large naturally occurring community of flora and fauna occupying a major habitat is:
a food chain |
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a biome |
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a community |
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a population |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
Which of the following is the narrowest classification of life?
family |
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domain |
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species |
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genus |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.