| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.20 |
| Score | 0% | 64% |
In the heart, blood flows from the __________ ventricle to the lungs then back to the heart via the __________ atrium.
left, left |
|
right, right |
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left, right |
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right, left |
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.
Which is the proper order of Earth's atmospheric layers from the surface up to space?
stratosphere, troposphere, mesosphere, thermosphere |
|
thermosphere, mesosphere, stratosphere, troposphere |
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mesosphere, thermosphere, stratosphere, troposphere |
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troposphere, stratosphere, mesosphere, thermosphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.
As part of digestion, the liver produces bile which breaks down:
fat |
|
starches |
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sugars |
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protein |
The liver produces bile which emulsifies (separates) fat.
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
medulla |
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cerebrum |
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cerebellum |
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brainstem |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).
The first step in the water cycle is:
reclamation |
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infiltration |
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precipitation |
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evaporation |
The water (hydrologic) cycle describes the movement of water from Earth through the atmosphere and back to Earth. The cycle starts when water evaporates into a gas from bodies of water like rivers, lakes and oceans or transpirates from the leaves of plants.