| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.91 |
| Score | 0% | 58% |
Which of these is not a type of fat?
saturated |
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cholesterol |
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monounsaturated |
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polyunsaturated |
Fats come in three types, saturated (meats, shellfish, eggs, milk), monounsaturated (olives, almonds, avocados), and polyunsaturated (vegetable oils).
Which of the following substances gives up positively charged hydrogen ions (H+) when dissolved in water?
solution |
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base |
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alkaline |
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acid |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.
Which of the following is the primary difference between a comet and an asteroid?
asteroids contain frozen water |
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asteroids have a coma |
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comets orbit the Sun |
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comets have an atmosphere |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
atomic mass units |
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protons |
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electrons |
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electron shells |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
In the food chain, omnivores may be which of the following?
secondary consumers or scavengers |
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primary or tertiary consumers |
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secondary or tertiary consumers |
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primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.