| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
Which of the following does not represent the freezing point of water?
0°C |
|
273K |
|
0°F |
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32°F |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.
A large naturally occurring community of flora and fauna occupying a major habitat is:
a community |
|
a population |
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a biome |
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a food chain |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
Which of the following would be used in eye glasses to correct nearsightedness?
convex lens |
|
concave lens |
|
concave mirror |
|
convex mirror |
Unlike curved mirrors that operate on the principle of reflection, lenses utilize refraction. A convex lens is thicker in the middle than on the edges and converges light while a concave lens is thicker on the edges than in the middle and diffuses light. A common use for curved lenses is in eye glasses where a convex lens is used to correct farsightedness and a concave lens is used to correct nearsightedness.
Which of the following is a decomposer?
ferret |
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mosquito |
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fungi |
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pine tree |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
Herbivores are __________ that subsist on producers like plants and fungus.
tertiary consumers |
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primary consumers |
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scavengers |
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secondary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.