| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
arthropod |
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spiny |
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vertebrate |
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sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
Which of these represents the path of blood flow through the heart?
right atrium → right ventricle → lungs → left atrium → left ventricle |
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left atrium → left ventricle → lungs → right atrium → right ventricle |
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right atrium → left ventricle → lungs → left atrium → right ventricle |
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left atrium → right ventricle → lungs → left atrium → right ventricle |
To provide oxygen to the body, blood flows through the heart in a path formed by the right atrium → right ventricle → lungs → left atrium → left ventricle → body. When blood enters the right side of the heart it is deoxygenated. It enters the left side of the heart oxygenated after traveling to the lungs.
Scalar quantities are fully described by which of the following?
a magnitude and a polarity |
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a magnitude and a direction |
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a magnitude only |
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a direction only |
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: \(\vec{v}\)
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
proton |
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atom |
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electron |
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neutron |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
Changes to an object's speed or direction of motion are caused by which of the following?
kinetic energy |
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work |
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a force |
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power |
Force is applied to change an object's speed or direction of motion.