| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
spiny |
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sentient |
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vertebrate |
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arthropod |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
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esophagus |
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small intestine |
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large intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of these is not a component of blood?
plasma |
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white blood cells |
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marrow |
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red blood cells |
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.
Which of the following is not a vector quantity?
velocity |
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momentum |
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acceleration |
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mass |
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: \(\vec{v}\)
Which of the following is not true about mass and weight?
weight is the force exerted on an object by gravity |
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mass depends on the location where it is measured |
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weight depends on the location where it is measured |
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mass is the amount of matter something has |
Mass is the amount of matter something has while weight is the force exerted on an object's mass by gravity. So, although a person's mass doesn't change when going from the Earth to the Moon, their weight will decrease because the force of the Moon's gravity is much less than that of Earth.