| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
An element in the physical state of __________ maintains a constant volume and shape.
gel |
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solid |
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liquid |
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gas |
An element in a solid state has atoms or molecules that are constricted and do not move freely. Solids maintain a constant volume and shape and exist at a lower temperature than liquids or gases.
What part of the brain is responsible for for balance, movement, and muscle coordination?
cerebellum |
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brainstem |
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medulla |
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cerebrum |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
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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secondary or tertiary consumers |
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primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.
As a cold front moves into an area, the heavier cool air __________ the lighter warm air that it is replacing.
pushes above |
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pushes under |
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cancels out |
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mixes with |
A cold front is a warm-cold air boundary with the colder air replacing the warmer. As a cold front moves into an area, the heavier cool air pushes under the lighter warm air that it is replacing. The warm air becomes cooler as it rises and, if the rising air is humid enough, the water vapor it contains will condense into clouds and precipitation may fall.
Which of the following is metamorphic rock?
marble |
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obsidian |
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coal |
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granite |
The Earth's rocks fall into three categories based on how they're formed. Igneous rock (granite, basalt, obsidian) is formed from the hardening of molten rock (lava), sedimentary rock (shale, sandstone, coal) is formed by the gradual despositing and cementing of rock and other debris, and metamorphic rock (marble, slate, quartzite) which is formed when existing rock is altered though pressure, temperature, or chemical processes.