| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.80 |
| Score | 0% | 76% |
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
large intestine |
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small intestine |
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mouth |
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stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
A large naturally occurring community of flora and fauna occupying a major habitat is:
a community |
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a food chain |
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a population |
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a biome |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
pH is a scale that measures of how basic or acidic a solution is. A solution with a pH of 4 is:
neutral |
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alkaline |
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basic |
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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.
Elements in the Periodic Table of the Elements are ordered by which of the following?
number of electron shells |
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atomic weight |
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atomic mass |
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atomic number |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.
Which of blood component carries oxygen?
red blood cells |
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white blood cells |
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plasma |
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platelets |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.