| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
The rate of vibration of sound is called:
frequency |
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amplitude |
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period |
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volume |
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.
"For every action, there is an equal and opposite reaction." This describes which of Newton's laws of motion?
first |
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third |
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fourth |
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second |
Newton's third law of motion states that For every action, there is an equal and opposite reaction. When an object exerts a force on another object, the second object exerts a force of equal magnitude in the opposite direction on the first object.
Which of these is not a phase in cell division?
cytokinesis |
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interphase |
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anaphase |
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megaphase |
Cell division is the process by which cells replicate genetic material in the nucleus and consists of several phases, beginning with interphase and ending with cytokinesis.
The dwarf planet Pluto is located where?
in the Kuiper Belt |
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in the asteroid belt |
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between the orbits of Jupiter and Saturn |
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outside the solar system |
The Kuiper Belt is similar to the asteroid belt but much larger. Extending beyond the orbit of Neptune, it contains objects composed mostly of frozen methane, ammonia, and water. Most notably, the Kuiper Belt is home to Pluto, a dwarf planet that, until a 2006 reclassification, was considered the ninth planet of the solar system.
As part of digestion, the liver produces bile which breaks down:
protein |
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starches |
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fat |
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sugars |
The liver produces bile which emulsifies (separates) fat.