| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.91 |
| Score | 0% | 58% |
Which of the following describes the Earth's outer core?
liquid |
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solid |
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primarily solid |
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makes up most of the Earth's volume |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
Which of the following is the narrowest classification of life?
genus |
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domain |
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species |
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family |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.
Velocity and displacement are fully described by both a magnitude and a direction. Velocity and displacement are which of the following?
combinational quantities |
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composite quantities |
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vector quantities |
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scalar quantities |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
What type of cloud is responsible for fog?
cirrus |
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stratus |
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cumulus |
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cumulonimbus |
Clouds are categorized based on their shape, size, and altitude. Stratus clouds are low-altitude clouds characterized by horizontal layering with a broad flat base. When stratus clouds occur on the ground the result is fog.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their size |
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their density |
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their location |
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their temperature |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.