| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
vertebrate |
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spiny |
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arthropod |
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sentient |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
Which of the following is not true about simple magnets?
same poles repel each other |
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all of these are untrue |
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opposite poles repel each other |
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opposite poles attract each other |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.
Which of the following represents the largest value?
1 kL |
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1 cL |
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1 mL |
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1 ML |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.
Which of these layers is found directly below the Earth's crust?
mantle |
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outer core |
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inner core |
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continents |
The crust is the Earth's outermost layer and is divided into oceanic and continental types. Oceanic crust is 3 miles (5 km) to 6 miles (10 km) thick and is composed primarily of denser rock. Continental crust is 20 to 30 miles (30 to 50 km) thick and composed primarily of less dense rock. The crust makes up approximately one percent of the Earth's total volume.
The asteroids in the Kuiper belt are composed of which of the following?
frozen methane, ammonia, and water |
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gaseous methane, ammonia, and water |
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minerals |
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rock |
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.