| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
In the Periodic Table of the Elements, atomic number is equal to which of the following?
number of protons + neutrons in the nucleus |
|
number of protons in the nucleus |
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number of neutrons in the nucleus |
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number of electrons orbiting 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.
What prevents blood pumped out of the ventricles from flowing back into the heart?
platelets |
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valves |
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atria |
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capillaries |
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.
__________ is caused by a lack of iron in the diet.
scurvy |
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anemia |
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shingles |
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diabetes |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
What type of cloud is responsible for fog?
stratus |
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cumulonimbus |
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cumulus |
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cirrus |
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.
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
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large intestine |
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esophagus |
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small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.