| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.59 |
| Score | 0% | 72% |
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = { t \over \vec{d} } \) |
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\(\vec{v} = \vec{d}t \) |
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\(\vec{v} = { \vec{d} \over t } \) |
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none of these |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)
Convert 0C° to F°.
-32 |
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32 |
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16 |
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0 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)
Blood is created in:
the heart |
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bone marrow |
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red blood cells |
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the liver |
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.
A biological community of interacting organisms and their physical environment is known as:
population |
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biome |
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community |
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ecosystem |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).
Which of the following is the narrowest classification of life?
species |
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family |
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domain |
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genus |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.