| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
tides |
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seasons |
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the northern lights |
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day and night cycle |
Tides are caused by the gravitational interaction of Earth and the Moon.
Menstruation occurs when:
the fetus is formed |
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the ovum becomes fertilized |
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the ovum fails to become fertilized |
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the zygote is formed |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
The dwarf planet Pluto is located where?
outside the solar system |
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between the orbits of Jupiter and Saturn |
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in the asteroid belt |
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in the Kuiper Belt |
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.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
stratus clouds |
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cirrus clouds |
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cumulus clouds |
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nimbus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
Small rocks shed by asteroids and comets that reach the earth are called:
meteorites |
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shooting stars |
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meteors |
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meteoroids |
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.