| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.48 |
| Score | 0% | 70% |
Which of the following is the formula for power?
\(P = \vec{w}t\) |
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\(P = w t\) |
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\(P = {\vec{w} \over t}\) |
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\(P = {w \over t}\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
An endoskeleton (internal skeleton) is a charateristic of __________ animals, including humans.
spiny |
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sentient |
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arthropod |
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vertebrate |
An endoskeleton (internal skeleton) is a charateristic of vertebrate animals, including humans.
The connective tissue that connects bones to other bones at joints is called:
cartilage |
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ligaments |
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knuckles |
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tendons |
Tough fibrous cords of connective tissue called tendons connect muscles to the skeleton while another type of connective tissue called ligaments connect bones to other bones at joints (elbow, knee, fingers, spinal column).
Earth's breathable air is held in which atmospheric layer?
mesosphere |
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troposphere |
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thermosphere |
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stratosphere |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
The small intestine utilizes enzymes produced where?
pancreas |
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liver |
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small intestine |
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all of these are correct |
The small intestine is where most digestion takes place. As food travels along the small intestine it gets broken down completely by enzymes secreted from the walls. These enzymes are produced in the small intestine as well as in the pancreas and liver. After the enzymes break down the food, the resulting substances are then absorbed into the blood via capillaries in the small intestine walls.