| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
In the metric system, what prefix represents 103?
kilo |
|
mega |
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milli |
|
centi |
Kilo is the metric system prefix for 103.
Small rocks shed by asteroids and comets that reach the earth are called:
meteoroids |
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meteorites |
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shooting stars |
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meteors |
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.
Tertiary consumers eat which of the following?
primary and secondary consumers |
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decomposers |
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producers |
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all of these |
Tertiary consumers eat primary consumers and secondary consumers and are typically carnivorous predators. Tertiary consumers may also be omnivores. Examples include wolves, sharks, and human beings.
What is a major difference between the somatic and autonomic nervous systems?
one controls voluntary activity, one controls involuntary activity |
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one is inherited, the other is learned |
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each belongs to a different nervous system |
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one controls thinking, the other controls feeling |
Both are part of the peripheral nervous system. The somatic nervous system sends sensory information to the central nervous system and controls voluntary actions while the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.
As part of the carbon cycle, plants release carbon into the atmosphere through which process?
sedimentation |
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evaporation |
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photosynthesis |
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decomposition |
The carbon cycle represents the ciruit of carbon through Earth's ecosystem. Carbon dioxide (CO2) in the atmosphere is absorbed by plants through photosynthesis. Plants then die and release carbon back into the atmosphere during decomposition or are eaten by animals who breathe (respiration) the carbon into the atmosphere they exhale and produce waste which also releases carbon as it decays.