| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
An air mass is a large body of air that has which of the following characteristics?
all of these |
|
similar moisture |
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similar density |
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similar temperature |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
When two air masses meet and neither is displaced, what kind of front is present?
occluded |
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stationary |
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warm |
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cold |
When two air masses meet and neither is displaced, a stationary front is created. Stationary fronts often cause persistent cloudy wet weather.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their size |
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their location |
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their temperature |
|
their density |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Which of the following is the smallest component of an element that still retains the properties of the element?
atom |
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element |
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molecule |
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neutron |
An atom is the smallest component of an element that still retains the properties of the element.
In the metric system, what prefix represents 103?
mega |
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centi |
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kilo |
|
milli |
Kilo is the metric system prefix for 103.