| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
reactants |
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isotopes |
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ions |
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products |
The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.
As part of digestion, the liver produces bile which breaks down:
protein |
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fat |
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sugars |
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starches |
The liver produces bile which emulsifies (separates) fat.
Large, puffy, mid-altitude clouds with a flat base and a rounded top describe which of the following?
cirrus clouds |
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stratus clouds |
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cumulus clouds |
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fog |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
Which of the following states of matter exists at the lowest temperature?
solid |
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none of these |
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liquid |
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gas |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Cirrus clouds are thin, wispy clouds composed of ice crystals. At what elevation to cirrus clouds form?
ground level |
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mid-altitude |
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low-altitude |
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high-altitude |
Cirrus clouds are thin, wispy high-altitude clouds composed of ice crystals that originate from the freezing of supercooled water droplets. Cirrus clouds generally occur in fair weather and point in the direction of air movement at their elevation.