| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.62 |
| Score | 0% | 52% |
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.
A biological community of interacting organisms and their physical environment is known as:
ecosystem |
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community |
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biome |
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population |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).
As part of the carbon cycle, plants release carbon into the atmosphere through which process?
evaporation |
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photosynthesis |
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sedimentation |
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decomposition |
The carbon cycle represents the ciruit of carbon through Earth's ecosystem. Carbon dioxide (CO2) in the atmosphere is absorbed by plants through photosynthesis. Plants then die and release carbon back into the atmosphere during decomposition or are eaten by animals who breathe (respiration) the carbon into the atmosphere they exhale and produce waste which also releases carbon as it decays.
During the water cycle, water enters the atmosphere as a gas through which process?
both evaporation and transpiration |
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transpiration |
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evaporation |
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precipitation |
The water (hydrologic) cycle describes the movement of water from Earth through the atmosphere and back to Earth. The cycle starts when water evaporates into a gas from bodies of water like rivers, lakes and oceans or transpirates from the leaves of plants.
In which type of compound are electrons shared between atoms?
ionic |
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covalent |
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chemical |
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molecular |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.