| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
When two air masses meet and neither is displaced, what kind of front is present?
warm |
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stationary |
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cold |
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occluded |
When two air masses meet and neither is displaced, a stationary front is created. Stationary fronts often cause persistent cloudy wet weather.
Molecules and atoms that are inputs to a chemical reaction are known as which of the following?
reactants |
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components |
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fuel |
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products |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
What is the body's largest artery?
capillary |
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vena cava |
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aorta |
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arteriole |
The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.
An air mass is a large body of air that has which of the following characteristics?
all of these |
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similar density |
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similar temperature |
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similar moisture |
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.
Force is measured in newtons (N) with 1 N being the force required to impart an acceleration of:
1 m/s to a mass of 1 kg |
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1 m/s2 to a mass of 1 kg/s2 |
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1 mph to a mass of 1 kg |
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1 m/s2 to a mass of 1 kg |
Weight is a force that describes the attraction of gravity on an object. Force is measured in newtons (N) with 1 N being the force required to impart an acceleration of 1 m/s2 to a mass of 1 kg.