| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
Which of these represents the path of blood flow through the heart?
right atrium → left ventricle → lungs → left atrium → right ventricle |
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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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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.
Which is the proper order of Earth's atmospheric layers from the surface up to space?
stratosphere, troposphere, mesosphere, thermosphere |
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thermosphere, mesosphere, stratosphere, troposphere |
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troposphere, stratosphere, mesosphere, thermosphere |
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mesosphere, thermosphere, stratosphere, troposphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.
Which of the following is not one of the outer planets?
Uranus |
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Jupiter |
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Venus |
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Neptune |
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.
Momentum is a measure of how difficult it is for a moving object to stop. Which of the following is the formula for momentum?
\(\vec{p} = m\vec{v}\) |
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\(\vec{p} = {m \over \vec{v}}\) |
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none of these |
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\(\vec{p} = { \vec{v} \over m}\) |
Momentum is a measure of how difficult it is for a moving object to stop and is calculated by multiplying the object's mass by its velocity: \(\vec{p} = m\vec{v}\). Like velocity, momentum is a vector quantity as it expresses force applied in a specific direction.
The angle of reflection is equal to which the following?
refractive index |
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focal point |
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90° |
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angle of incidence |
The law of reflection specifies how waves, including light waves, bounce off of surfaces. Specifically, the angle of incidence of the approaching wave is equal to the angle of reflection of the reflected wave as measured from a line perpendicular (90°) to the surface.