| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
Which of the following describes the Earth's mantle?
liquid |
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solid |
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primarily solid |
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primarily liquid |
Mantle makes up 84% of the Earth's volume and has an average thickness of approximately 1,800 miles (2,900 km). It is dense, hot, and primarily solid although in places it behaves more like a viscous fluid as the plates of the upper mantle and crust gradually "float" along its circumference.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
large intestine |
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mouth |
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small intestine |
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stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
The gravitational interaction of Earth and the Moon is responsible for which of these?
the northern lights |
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tides |
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seasons |
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day and night cycle |
Tides are caused by the gravitational interaction of Earth and the Moon.
An element in the physical state of __________ maintains neither a constant volume nor a constant shape.
plasma |
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gas |
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solid |
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liquid |
The gaseous state occurs at a higher temperature range than the solid and liquid states of the same substance. In this state, molecules flow very freely around each other and will spread out as far as they're able. Gases maintain neither a constant volume nor a constant shape.
In the food chain, omnivores may be which of the following?
secondary consumers or scavengers |
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primary or tertiary consumers |
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primary or secondary consumers |
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secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.