| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
A subatomic particle found in the nucleus of an atom. It carries no electric charge. This desribes which of the following?
electron |
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neutron |
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atom |
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proton |
A neutron is a subatomic particle found in the nucleus of an atom. It is neutral as it carries no electric charge.
In the classification of life, which of the following is not a kingdom?
animals |
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plants |
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bacteria |
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fungi |
Below domain, life is classified into six kingdoms: plants, animals, archaebacteria, eubacteria, and fungi. The last kingdom, protists, include all microscopic organisms that are not bacteria, animals, plants or fungi. (Archaebacteria and eubacteria are sometimes combined into a single kingdom, monera.)
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
double the number of |
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fewer |
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equal numbers of |
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more |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
As part of digestion, the liver produces bile which breaks down:
sugars |
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starches |
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fat |
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protein |
The liver produces bile which emulsifies (separates) fat.
Which of the following would be used in eye glasses to correct nearsightedness?
convex lens |
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concave mirror |
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convex mirror |
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concave lens |
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.