| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
What part of the food chain serves only as food for other organisms?
decomposers |
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secondary consumers |
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producers |
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primary 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
During digestion, after proteins are broken down where does the undigested food go next?
esophagus |
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small intestine |
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stomach |
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large intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of blood component carries oxygen?
plasma |
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white blood cells |
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platelets |
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red blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Small rocks shed by asteroids and comets that reach the earth are called:
meteors |
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meteorites |
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meteoroids |
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shooting stars |
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.
The dwarf planet Pluto is located where?
outside the solar system |
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in the Kuiper Belt |
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between the orbits of Jupiter and Saturn |
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in the asteroid 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.