| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
Bronchioles, alveolus, and capillaries are vital parts of which bodily system?
nervous |
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circulation |
|
digestion |
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respiration |
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.
Which of the following is the correct order for types of radiation from lowest to highest frequency?
microwaves → radio waves → visible light |
|
infrared waves → microwaves → ultraviolet light |
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visible light → ultraviolet light → radio waves |
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radio waves → visible light → gamma rays |
The electromagnetic spectrum covers all possible wavelengths and frequencies of radiation. From lowest frequency (longest wavelength) to highest frequency (shortest wavelength) radiation: radio waves → microwaves → infrared waves → visible light → ultraviolet light → X-rays → gamma rays.
Water freezing or boiling is an example of which of the following?
sublimation |
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cooling |
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heating |
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phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
As part of digestion, the liver produces bile which breaks down:
starches |
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protein |
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sugars |
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fat |
The liver produces bile which emulsifies (separates) fat.
In the water cycle, infiltration is most closely related to:
runoff |
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oceans |
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water table |
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rivers |
The water then accumulates as runoff and eventually returns to bodies of water or is absorbed into the Earth (infiltration) and becomes part of the water table, an underground resevoir of fresh water.