| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Poor balance could indicate an issue with which part of the nervous system?
cerebrum |
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cerebellum |
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medulla |
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spinal cord |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
Scalar quantities are fully described by which of the following?
a direction only |
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a magnitude and a direction |
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a magnitude only |
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a magnitude and a polarity |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
The universal recipient blood type can recieve any other blood type. Which blood type is the universal recipient?
AB |
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O-negative |
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AB-positive |
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O |
Blood transfer is limited by the type and Rh factor of the blood. Someone who has Rh-factor negative blood cannot receive blood with a positive type but a person with Rh-factor positive type blood can receive Rh-negative blood. Type O negative blood is the universal donor because it can be given to a person with any blood type. Type AB positive is the universal recipient meaning someone with this blood type can receive any other type of blood.
Which of the following is the smallest component of an element that still retains the properties of the element?
element |
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molecule |
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neutron |
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atom |
An atom is the smallest component of an element that still retains the properties of the element.
An air mass is a large body of air that has which of the following characteristics?
all of these |
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similar moisture |
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similar temperature |
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similar density |
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.