| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.81 |
| Score | 0% | 76% |
Absolute zero is which of the following?
0°C |
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the coldest temperature possible in the universe |
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the freezing point of oxygen |
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the freezing point of hydrogen |
In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.
An element in the physical state of __________ maintains neither a constant volume nor a constant shape.
plasma |
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liquid |
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gas |
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solid |
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.
The number system most used in science is the:
American system |
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British system |
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metric system |
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English system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.
What is a major difference between the somatic and autonomic nervous systems?
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 |
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one controls voluntary activity, one controls involuntary activity |
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.
Herbivores are __________ that subsist on producers like plants and fungus.
secondary consumers |
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tertiary consumers |
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primary consumers |
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scavengers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.