| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
A major difference between sound waves and light waves is which of the following?
a sound wave is much slower than a light wave |
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all of these are correct |
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a sound wave is mechanical while a light wave is electromagnetic |
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a sound wave cannot travel through a vacuum |
A vibrating object produces a sound wave that travels outwardly from the object through a medium (any liquid or solid matter). The vibration disturbs the particles in the surrounding medium, those particles disturb the particules next to them, and so on, as the sound propagates away from the vibration.
A human heart consists of how many chambers?
4 |
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8 |
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1 |
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2 |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
Which of these does not contain oxygenated blood?
right atrium |
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pulmonary vein |
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left ventricle |
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aorta |
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.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
blood cells |
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bronchioles |
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diaphragms |
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capillaries |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
A dominant trait will be expressed when paired with:
a recessive trait |
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a chromosome |
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a gene |
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a dominant trait |
The traits represented by genes are inherited independently of each other (one from the male and one from the female gamete) and a trait can be dominant or recessive. A dominant trait will be expressed when paired with a recessive trait while two copies of a recessive trait (one from each parent) must be present for the recessive trait to be expressed.