| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.99 |
| Score | 0% | 60% |
In the classification of life, which of the following is not a kingdom?
animals |
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fungi |
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plants |
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bacteria |
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.)
Which of the following states of matter exists at the highest temperature?
gas |
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liquid |
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none of these |
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solid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
__________ and __________ pair to strengthen bones.
calcium, vitamin A |
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vitamin D, magnesium |
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iron, calcium |
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vitamin D, calcium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
Which of the following substances gives up positively charged hydrogen ions (H+) when dissolved in water?
solution |
|
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.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their size |
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their temperature |
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their location |
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their density |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.