| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
In the metric system, what prefix represents 103?
milli |
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mega |
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kilo |
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centi |
Kilo is the metric system prefix for 103.
The rows of the Periodic Table of the Elements are called:
shells |
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periods |
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families |
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groups |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
The two heart chambers that pump blood called:
ventricles |
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atria |
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aorta |
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valves |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
A large naturally occurring community of flora and fauna occupying a major habitat is:
a food chain |
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a population |
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a biome |
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a community |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
Veins carry blood __________ the heart.
within |
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all of these |
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away from |
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back to |
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.