| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.24 |
| Score | 0% | 65% |
In the metric system, what prefix represents 103?
kilo |
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milli |
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mega |
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centi |
Kilo is the metric system prefix for 103.
The two heart chambers that pump blood called:
aorta |
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ventricles |
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atria |
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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.
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.
The rows of the Periodic Table of the Elements are called:
shells |
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periods |
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groups |
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families |
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.
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
side effects |
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products |
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results |
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reactants |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).