| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.63 |
| Score | 0% | 73% |
What part of the food chain serves only as food for other organisms?
primary consumers |
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decomposers |
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secondary consumers |
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producers |
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
__________ is caused by a lack of iron in the diet.
anemia |
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diabetes |
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scurvy |
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shingles |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
"For every action, there is an equal and opposite reaction." This describes which of Newton's laws of motion?
third |
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second |
|
fourth |
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first |
Newton's third law of motion states that For every action, there is an equal and opposite reaction. When an object exerts a force on another object, the second object exerts a force of equal magnitude in the opposite direction on the first object.
In the food chain, consumers are classified as which of the following?
primary |
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tertiary |
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secondary |
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all of these |
Most animals consume other organisms to survive. Consumers (heterotrophs) are divided into three types, primary, secondary, and tertiary, based on their place in the food chain.
Which of the following would be used in eye glasses to correct farsightedness?
concave mirror |
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concave lens |
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convex mirror |
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convex lens |
Unlike curved mirrors that operate on the principle of reflection, lenses utilize refraction. A convex lens is thicker in the middle than on the edges and converges light while a concave lens is thicker on the edges than in the middle and diffuses light. A common use for curved lenses is in eye glasses where a convex lens is used to correct farsightedness and a concave lens is used to correct nearsightedness.