| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
Which is the proper order of Earth's atmospheric layers from the surface up to space?
mesosphere, thermosphere, stratosphere, troposphere |
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thermosphere, mesosphere, stratosphere, troposphere |
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troposphere, stratosphere, mesosphere, thermosphere |
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stratosphere, troposphere, mesosphere, thermosphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
capillaries |
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diaphragms |
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blood cells |
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bronchioles |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
The large intestine does which of the following?
breaks down proteins |
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breaks down fats |
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processes the physical waste produced by digestion |
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breaks down starches |
The large intestine (colon) follows the small intestine and processes the physical waste produced by digestion, absorbing water and minerials that remain back into the body. Solid waste is then stored in the rectum while liquid waste is stored in the bladder.
Which of the following is not a terrestrial planet?
Venus |
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Earth |
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Mercury |
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Jupiter |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
The hottest of Earth's atmospheric layers is which of the following?
thermosphere |
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troposphere |
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mesosphere |
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stratosphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.