| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
When light travels between two substances it bends. This is called:
convection |
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refraction |
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reflection |
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conduction |
Because different materials have different refractive indices, light changes speed when passing from one material to another. This causes the light to bend (refraction) at an angle that depends on the change in refractive index between the materials. The greater the difference, the higher the angle of refraction.
Cirrus clouds are thin, wispy clouds composed of ice crystals. At what elevation to cirrus clouds form?
mid-altitude |
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ground level |
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low-altitude |
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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.
Reproductive haploids are also known as:
ovum |
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sperm |
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diploids |
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gametes |
Reproductive (haploid) cells known as gametes have half as many (23) pairs of chromosomes as normal (diploid) cells. When the male gamete (sperm) combines with the female gamete (ovum) through meiosis to form a zygote, each gamete supplies half the chromosomes needed to form the normal diploid cells.
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
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esophagus |
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small intestine |
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large intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following represents the largest value?
1 ML |
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1 mL |
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1 kL |
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1 cL |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.