| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.02 |
| Score | 0% | 60% |
A large naturally occurring community of flora and fauna occupying a major habitat is:
a biome |
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a population |
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a food chain |
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a community |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
The dwarf planet Pluto is located where?
outside the solar system |
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in the asteroid belt |
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in the Kuiper Belt |
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between the orbits of Jupiter and Saturn |
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.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their location |
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their temperature |
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their density |
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their size |
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.
In which type of compound are electrons shared between atoms?
covalent |
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ionic |
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molecular |
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chemical |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
In the heart, blood flows from the __________ ventricle to the lungs then back to the heart via the __________ atrium.
right, right |
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right, left |
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left, left |
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left, right |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.