| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
The energy posessed by a ball on the window ledge of a tall building is an example of what kind of energy?
gravitational |
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potential |
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inherent |
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kinetic |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
Arteries carry __________ blood at __________ pressure.
oxygenated, low |
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deoxygenated, low |
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oxygenated, high |
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deoxygenated, high |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.
Which of the following does not represent the freezing point of water?
0°F |
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273K |
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0°C |
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32°F |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.
Which of these parts of digestion takes place in the mouth?
absorbing nutrients |
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breaking down starches |
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breaking down proteins |
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breaking down fats |
Digestion begins in the mouth where the teeth and tongue break down food mechanically through chewing and saliva, via the enzyme salivary amylase, starts to break starches down chemically. From the mouth, food travels down the esophagus where contractions push the food into the stomach.
The gravitational interaction of Earth and the Moon is responsible for which of these?
tides |
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seasons |
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day and night cycle |
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the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.