| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.62 |
| Score | 0% | 72% |
Which of the following states of matter exists at the highest temperature?
solid |
|
none of these |
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liquid |
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gas |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Water freezing or boiling is an example of which of the following?
heating |
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sublimation |
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cooling |
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phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
In the heart, the __________ artery and vein manage blood flow to the lungs.
pulmonary |
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capillary |
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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.
The two heart chambers that pump blood called:
valves |
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atria |
|
aorta |
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ventricles |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
The biosphere consists of which of the following?
hydrosphere |
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atmosphere |
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all of these |
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lithosphere |
The biosphere is the global ecological system integrating all living beings and their relationships. This includes their interactions with the lithosphere (the rigid outer part of the earth, consisting of the crust and upper mantle), hydrosphere (all surface water), and atmosphere (the envelope of gases surrounding the planet).