| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
In the Periodic Table of the Elements, atomic number is equal to which of the following?
number of neutrons in the nucleus |
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number of protons + neutrons in the nucleus |
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number of electrons orbiting the nucleus |
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number of protons in the nucleus |
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.
The rate of vibration of sound is called:
frequency |
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amplitude |
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period |
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volume |
The rate of vibration of sound is called frequency and is measured in hertz (Hz). One hertz is one repetition per second and sounds with high frequency have a higher pitch than sounds with lower frequency. Humans can hear sounds in the range of 20 Hz to 20 kHz.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
stratus clouds |
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cirrus clouds |
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nimbus clouds |
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cumulus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
As part of digestion, the liver produces bile which breaks down:
fat |
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protein |
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sugars |
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starches |
The liver produces bile which emulsifies (separates) fat.
The Rh factor antigen in blood determines:
universal recipient status |
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postive or negative |
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universal donor status |
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blood type |
Blood is categorized into four different types (A, B, AB, and O) based on the type of antigens found on the outside of the red blood cells. Additionally, each type can be negative or positive based on whether or not the cells have an antigen called the Rh factor.