| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.01 |
| Score | 0% | 60% |
As part of digestion, the liver produces bile which breaks down:
starches |
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protein |
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sugars |
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fat |
The liver produces bile which emulsifies (separates) fat.
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.
Which of the following would you find in the side view mirror of a car?
convex mirror |
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concave mirror |
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convex lens |
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concave lens |
A concave (or converging) mirror bulges inward and focuses reflected light on the mirror's focal point where the mirror's angles of incidence converge. In contrast, a convex (or diverging) mirror bulges outward and diffuses the light waves that strike it. A common use of a concave mirror is in a reflecting telescope, a common use of a convex mirror is in the side view mirror of a car.
Which of the following is not a base unit in the metric system?
degree Fahrenheit |
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gram |
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meter |
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liter |
The Fahrenheit scale is used for measuring temperature in the British system. The metric system uses the Celsius scale.
Veins __________ blood at __________ pressure.
deoxygenated, low |
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deoxygenated, high |
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oxygenated, low |
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oxygenated, high |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.