| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.16 |
| Score | 0% | 63% |
The two heart chambers that collect blood are called:
ventricles |
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valves |
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aorta |
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atria |
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.
The gravitational interaction of Earth and the Moon is responsible for which of these?
the northern lights |
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tides |
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day and night cycle |
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seasons |
Tides are caused by the gravitational interaction of Earth and the Moon.
What type of cloud is responsible for fog?
cirrus |
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cumulonimbus |
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cumulus |
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stratus |
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.
In the metric system, what prefix represents 10-3?
kilo |
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milli |
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centi |
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mega |
In the metric system, milli is the prefix for 10-3.
"For every action, there is an equal and opposite reaction." This describes which of Newton's laws of motion?
fourth |
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third |
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first |
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second |
Newton's third law of motion states that For every action, there is an equal and opposite reaction. When an object exerts a force on another object, the second object exerts a force of equal magnitude in the opposite direction on the first object.