| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
atom |
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proton |
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electron |
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neutron |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
In the classification of life, which of the following is not a domain?
archaea |
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bacteria |
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eukaryota |
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animalia |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
When compared to eukaryotic cells, prokaryotic cells are:
similarly complex |
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more complex |
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less complex |
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none of these |
Cells are classified into one of two groups based on whether or not they have a nucleus. Eukaryotic cells have a nucleus, prokaryotic cells do not have a nucleus and therefore have a less complex structure than eukaryotic cells.
Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?
products |
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isotopes |
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ions |
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reactants |
The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.
Sound travels fastest through which of the following media?
water |
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vacuum |
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metal |
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air |
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).