| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.60 |
| Score | 0% | 72% |
Minerals, vitamins, and fiber are:
macronutrients |
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micronutrients |
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carbohydrates |
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proteins |
Minterals, vitamins, and fiber are micronutrients while proteins, carbohydrates, and fats are macronutrients.
As part of digestion, the liver produces bile which breaks down:
fat |
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sugars |
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protein |
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starches |
The liver produces bile which emulsifies (separates) fat.
A biological community of interacting organisms and their physical environment is known as:
biome |
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ecosystem |
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population |
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community |
An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).
pH is a scale that measures of how basic or acidic a solution is. A solution with a pH of 9 is:
water |
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alkaline |
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neutral |
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acidic |
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.
The rate of vibration of sound is called:
frequency |
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period |
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volume |
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amplitude |
The rate of vibration of sound is called frequency and is measured in hertz (Hz). One hertz is one repetition per second and sounds with high frequency have a higher pitch than sounds with lower frequency. Humans can hear sounds in the range of 20 Hz to 20 kHz.