| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
The four planets closest to the Sun are called terrestrial. What does terrestrial mean?
the planets have water |
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the planets have magnetic fields |
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the planets have moons |
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the planets are Earth-like |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
arthropod |
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vertebrate |
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spiny |
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sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
In the metric system, what prefix represents 10-3?
mega |
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kilo |
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centi |
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milli |
In the metric system, milli is the prefix for 10-3.
During continental drift, the drifting plates move across which of the following?
water |
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liquid mantle |
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fault lines |
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sediment |
The crust and the rigid lithosphere (upper mantle) is made up of approximately thirty separate plates. These plates more very slowly on the slightly more liquid mantle (asthenosphere) beneath them. This movement has resulted in continental drift which is the gradual movement of land masses across Earth's surface. Continental drift is a very slow process, occurring over hundreds of millions of years.
An asteroid belt holds many of the asteroids in our solar system. It is located between the orbits of which planets?
Mars and Earth |
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Mars and Jupiter |
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Mercury and Venus |
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Jupiter and Saturn |
The solar system also contains over a million rocky fragments of at least 1km in diameter called asteroids as well as millions more with smaller diameters. Many of these asteroids are an asteroid belt between the orbits of Mars and Jupiter.