| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
Water freezing or boiling is an example of which of the following?
cooling |
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sublimation |
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phase transition |
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heating |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
Which of the following describes how a person's genes express themselves in physical characteristics?
genotype |
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phenotype |
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chromotype |
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DNA |
A person's genotype is their genetic makeup and includes both dominant and recessive alleles. Phenotype is how the genes express themselves in physical characteristics.
Cirrus clouds are thin, wispy clouds composed of ice crystals. At what elevation to cirrus clouds form?
low-altitude |
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mid-altitude |
|
ground level |
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high-altitude |
Cirrus clouds are thin, wispy high-altitude clouds composed of ice crystals that originate from the freezing of supercooled water droplets. Cirrus clouds generally occur in fair weather and point in the direction of air movement at their elevation.
The process of diffusion allows __________ to exchange oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells.
red blood cells |
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arteries |
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capillaries |
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veins |
Capillaries are small thin-walled vessels that permit the exchange of oxygen, carbon dioxide, nutrients, and waste between blood and the body's cells. This process of exchange is called diffusion.
The gravitational interaction of Earth and the Moon is responsible for which of these?
tides |
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day and night cycle |
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seasons |
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the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.