| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
In the metric system, what prefix represents 10-3?
milli |
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mega |
|
centi |
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kilo |
In the metric system, milli is the prefix for 10-3.
Veins __________ blood at __________ pressure.
oxygenated, high |
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oxygenated, low |
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deoxygenated, high |
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deoxygenated, low |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.
Stratus clouds are __________clouds characterized by horizontal layering with a broad flat base.
all-altitude |
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low-altitude |
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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.
Which of the following is not a vector quantity?
momentum |
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acceleration |
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mass |
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velocity |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
The gravitational interaction of Earth and the Moon is responsible for which of these?
seasons |
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the northern lights |
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tides |
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day and night cycle |
Tides are caused by the gravitational interaction of Earth and the Moon.