| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.61 |
| Score | 0% | 52% |
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
molecule |
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compound |
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atom |
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element |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
radiation |
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conduction |
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reflection |
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convection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
When the clouds become too saturated with water, the water is released as precipitation in the form of:
snow |
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rain |
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ice |
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snow or ice |
Rising into the atmosphere, the water condenses into clouds. When the clouds become too saturated with water, the water is released as snow or ice precipitation which may warm as it falls to reach Earth as rain.
As part of the carbon cycle, plants release carbon into the atmosphere through which process?
photosynthesis |
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decomposition |
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sedimentation |
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evaporation |
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.
Elements in the Periodic Table of the Elements are ordered by which of the following?
atomic mass |
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atomic number |
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number of electron shells |
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atomic weight |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.