| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.21 |
| Score | 0% | 64% |
In the Periodic Table of the Elements, atomic number is equal to which of the following?
number of electrons orbiting the nucleus |
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number of protons in the nucleus |
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number of neutrons in the nucleus |
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number of protons + neutrons 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.
Which of the following is not true about simple magnets?
same poles repel each other |
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opposite poles repel each other |
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opposite poles attract each other |
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all of these are untrue |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.
-40°F is how many °C?
\({40 \over 9}\) |
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-8 |
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-40 |
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\(-{40 \over 9}\) |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)
Which of blood component carries oxygen?
white blood cells |
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red blood cells |
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platelets |
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plasma |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
What part of the brain is responsible for for balance, movement, and muscle coordination?
brainstem |
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medulla |
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cerebellum |
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cerebrum |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.