| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
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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a sound wave cannot travel through a vacuum |
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a sound wave is mechanical while a light wave is electromagnetic |
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all of these are correct |
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.
The gravitational interaction of Earth and the Moon is responsible for which of these?
seasons |
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the northern lights |
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tides |
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day and night cycle |
Tides are caused by the gravitational interaction of Earth and the Moon.
Which of the following is the smallest component of an element that still retains the properties of the element?
neutron |
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element |
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atom |
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molecule |
An atom is the smallest component of an element that still retains the properties of the element.
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
nervous |
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respiration |
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circulation |
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digestion |
The trachea branches into the left and right bronchi which each lead to a lung where the bronchi subdivide into smaller tubes called bronchioles. Each bronchiole ends in a small sac called an alveolus which allows oxygen from the air to enter the bloodstream via tiny blood vessels called capillaries.
The __________ nervous system controls voluntary actions.
somatic |
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autonomic |
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peripheral |
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central |
Part of the peripheral nervous system, the somatic nervous system is made up of nerve fibers that send sensory information to the central nervous system and control voluntary actions.