| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.92 |
| Score | 0% | 78% |
Which of the following states of matter exists at the lowest temperature?
gas |
|
none of these |
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solid |
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liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
Which of blood component carries oxygen?
red blood cells |
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platelets |
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white blood cells |
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plasma |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
The ovum and oviduct are part of which bodily system?
digestive |
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nervous |
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circulatory |
|
reproductive |
Approximately every 28 days during female ovulation an egg (ovum) is released from one of the ovaries and travels through the oviduct (fallopian tube) and into the uterus. At the same time, the endometrial lining of the uterus becomes prepared for implantation.
Menstruation occurs when:
the zygote is formed |
|
the ovum becomes fertilized |
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the fetus is formed |
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the ovum fails to become fertilized |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
The pitch of the siren of an approaching ambulance changes as it approaches you. This is an example of which of the following?
refraction |
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Doppler effect |
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reflection |
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sound radiation |
The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.