| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
The dwarf planet Pluto is located where?
between the orbits of Jupiter and Saturn |
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in the Kuiper Belt |
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in the asteroid belt |
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outside the solar system |
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.
Which of the following is the smallest component of an element that still retains the properties of the element?
molecule |
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neutron |
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element |
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atom |
An atom is the smallest component of an element that still retains the properties of the element.
Which of these parts of digestion takes place in the mouth?
breaking down fats |
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breaking down proteins |
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absorbing nutrients |
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breaking down starches |
Digestion begins in the mouth where the teeth and tongue break down food mechanically through chewing and saliva, via the enzyme salivary amylase, starts to break starches down chemically. From the mouth, food travels down the esophagus where contractions push the food into the stomach.
What part of the food chain serves only as food for other organisms?
primary consumers |
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decomposers |
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producers |
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secondary consumers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis
Which of the following is the narrowest classification of life?
domain |
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family |
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genus |
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species |
The narrowest classification of life, species, contains organisms that are so similar that they can only reproduce with others of the same species.