| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
The __________ is a system of muscles that allows breathing.
pulmonary |
|
diaphragm |
|
trachea |
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bronchioles |
The diaphragm is a system of muscles that allows breathing. During inhalation, the diaphragm expands and air rushes in to fill the space created. Then, during exhalation, the diaphragm contracts and forces the air back out.
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
|
esophagus |
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small intestine |
|
stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
An element in the physical state of __________ maintains neither a constant volume nor a constant shape.
liquid |
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plasma |
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gas |
|
solid |
The gaseous state occurs at a higher temperature range than the solid and liquid states of the same substance. In this state, molecules flow very freely around each other and will spread out as far as they're able. Gases maintain neither a constant volume nor a constant shape.
A major difference between sound waves and light waves is which of the following?
all of these are correct |
|
a sound wave is mechanical while a light wave is electromagnetic |
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a sound wave is much slower than a light wave |
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a sound wave cannot travel through a vacuum |
A vibrating object produces a sound wave that travels outwardly from the object through a medium (any liquid or solid matter). The vibration disturbs the particles in the surrounding medium, those particles disturb the particules next to them, and so on, as the sound propagates away from the vibration.
Examples of secondary consumers include:
grasshoppers |
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wolves |
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chickens |
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plankton |
Secondary consumers (carnivores) subsist mainly on primary consumers. Omnivores are secondary consumers that also eat producers. Examples are rats, fish, and chickens.