| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.70 |
| Score | 0% | 54% |
In the food chain, omnivores may be which of the following?
primary or secondary consumers |
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secondary consumers or scavengers |
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secondary or tertiary consumers |
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primary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
During the water cycle, water enters the atmosphere as a gas through which process?
both evaporation and transpiration |
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transpiration |
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precipitation |
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evaporation |
The water (hydrologic) cycle describes the movement of water from Earth through the atmosphere and back to Earth. The cycle starts when water evaporates into a gas from bodies of water like rivers, lakes and oceans or transpirates from the leaves of plants.
Sound travels fastest through which of the following media?
vacuum |
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air |
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metal |
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water |
The speed of a sound wave will vary with the medium. Sound travels fastest through media that has particles that are very close together, like metal. Thus, it travels faster through water than through air and doesn't travel at all through a vacuum (there are no particles in empty space to vibrate).
Which of the following is not one of the outer planets?
Uranus |
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Venus |
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Neptune |
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Jupiter |
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.
A biological community of interacting organisms and their physical environment is known as:
ecosystem |
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community |
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population |
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biome |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).