| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
Cirrus clouds are thin, wispy clouds composed of ice crystals. At what elevation to cirrus clouds form?
ground level |
|
low-altitude |
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mid-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.
Stratus clouds are __________clouds characterized by horizontal layering with a broad flat base.
low-altitude |
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all-altitude |
|
mid-altitude |
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high-altitude |
Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.
What kind of weather front is likely to create clouds and storms?
stationary front |
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warm front |
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temperate front |
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cold front |
A warm front is the boundary between warm and cool (or cold) air when the warm air is replacing the cold air. Warm air at the surface pushes above the cool air mass creating clouds and storms.
Absolute zero is which of the following?
0°C |
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the coldest temperature possible in the universe |
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the freezing point of hydrogen |
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the freezing point of oxygen |
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.
Elements in the Periodic Table of the Elements are ordered by which of the following?
atomic weight |
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atomic mass |
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atomic number |
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number of electron shells |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.