| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.16 |
| Score | 0% | 63% |
Which of the following is the smallest component of an element that still retains the properties of the element?
neutron |
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atom |
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element |
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molecule |
An atom is the smallest component of an element that still retains the properties of the element.
Which of the following is not a method of heat transfer?
radiation |
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convection |
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conduction |
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reflection |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
When the clouds become too saturated with water, the water is released as precipitation in the form of:
snow |
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ice |
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snow or ice |
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rain |
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.
The hottest of Earth's atmospheric layers is which of the following?
mesosphere |
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stratosphere |
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troposphere |
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thermosphere |
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.
Earth's troposphere layer is which of the following?
hottest |
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closest to the surface |
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coldest |
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farthest from the surface |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.