| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
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.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
stratus clouds |
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cirrus clouds |
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cumulus clouds |
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nimbus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
Which of the following describes the Earth's outer core?
makes up most of the Earth's volume |
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primarily solid |
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liquid |
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solid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
Vector quantities are fully described by which of the following?
a magnitude only |
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a direction only |
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a magnitude and a direction |
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a direction 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: \(\vec{v}\)
Which of the following is the formula for power?
\(P = {w \over t}\) |
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\(P = w t\) |
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\(P = {\vec{w} \over t}\) |
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\(P = \vec{w}t\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).