| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.97 |
| Score | 0% | 59% |
Which of the following is the primary difference between a comet and an asteroid?
comets orbit the Sun |
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asteroids have a coma |
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comets have an atmosphere |
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asteroids contain frozen water |
A comet is a loose collection of ice, dust, and small rocky particles that, in contrast to an asteroid, has an extended atmosphere surrounding the center. When passing close to the Sun, this atmosphere warms and begins to release gases forming a visible coma or tail.
Which of the following describes the Earth's outer core?
liquid |
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makes up most of the Earth's volume |
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primarily solid |
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solid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
Leafy vegetables, beans, potatoes, fruits, and whole grains are good sources of:
protein |
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saturated fat |
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unsaturated fat |
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fiber |
Fiber provides bulk to help the large intestine carry away waste. Good sources of fiber are leafy vegetables, beans, potatoes, fruits, and whole grains.
Which of these is not a phase in cell division?
interphase |
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anaphase |
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megaphase |
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cytokinesis |
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.
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
molecule |
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atom |
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element |
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compound |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.