| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
Which of the following states of matter exists at the highest temperature?
liquid |
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none of these |
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gas |
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solid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Which of the following states of matter exists at the lowest temperature?
solid |
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liquid |
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gas |
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none of these |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Heat is always transferred from __________ to __________ environments.
dense, empty |
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cooler, warmer |
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warmer, cooler |
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empty, dense |
Heat is always transferred from warmer to cooler environments and conduction is the simplest way this transfer can occur. It is accomplished through direct contact between materials and materials like metals that transfer heat efficiently are called conductors while those that conduct heat poorly, such as plastic, are called insulators.
Which of the following is not a characteristic of the Sun?
is composed of hydrogen and helium |
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formed 2.6 billion years ago |
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is a yellow dwarf star |
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makes up over 99% of the mass of the solar system |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
cirrus clouds |
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stratus clouds |
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cumulus clouds |
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nimbus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.