| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.37 |
| Score | 0% | 67% |
Saturated fats can __________ LDL ("bad") cholesterol while unsaturated fats can __________ it.
raise, decrease |
|
stabilize, raise |
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decrease, stabilize |
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decrease, raise |
Saturated fats can raise LDL ("bad") cholesterol while unsaturated fats can decrease it.
The energy posessed by a ball on the window ledge of a tall building is an example of what kind of energy?
kinetic |
|
potential |
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gravitational |
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inherent |
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.
In the heart, the __________ artery and vein manage blood flow to the lungs.
capillary |
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pulmonary |
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aorta |
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atrial |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
A major difference between sound waves and light waves is which of the following?
all of these are correct |
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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 |
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a sound wave is mechanical while a light wave is electromagnetic |
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.
Which of the following is true about species groups?
a community is made up of a group of populations |
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an ecosystem is a biological population |
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a biome is a made up of a group of biospheres |
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a population is made up of a group of communities |
A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.