| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.95 |
| Score | 0% | 59% |
Which of the following is not true of light waves?
are mechanical waves |
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travel faster than sound waves |
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are electromagnetic waves |
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can travel through a vacuum |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.
In the food chain, omnivores may be which of the following?
secondary consumers or scavengers |
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secondary or tertiary consumers |
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primary or tertiary consumers |
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primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.
Heredity is the passing on of physical or mental characteristics genetically from one __________ to another.
family |
|
generation |
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cell |
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species |
Heredity is the passing on of physical or mental characteristics genetically from one generation to another. Heredity is made possible via large strings of chromosomes which carry information encoded in genes.
During digestion, after proteins are broken down where does the undigested food go next?
small intestine |
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large intestine |
|
esophagus |
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stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following is not true about mass and weight?
mass depends on the location where it is measured |
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weight is the force exerted on an object by gravity |
|
mass is the amount of matter something has |
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weight depends on the location where it is measured |
Mass is the amount of matter something has while weight is the force exerted on an object's mass by gravity. So, although a person's mass doesn't change when going from the Earth to the Moon, their weight will decrease because the force of the Moon's gravity is much less than that of Earth.