| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
Cirrus clouds are thin, wispy clouds composed of ice crystals. At what elevation to cirrus clouds form?
low-altitude |
|
ground level |
|
high-altitude |
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mid-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.
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
brainstem |
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cerebellum |
|
cerebrum |
|
medulla |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).
An air mass is a large body of air that has which of the following characteristics?
similar moisture |
|
similar temperature |
|
similar density |
|
all of these |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.
Within DNA, a variety of a particular gene is called a(n):
heterozygous |
|
allele |
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homozygous |
|
chromosome |
The gene is the base unit of inheritance and is contained within DNA. A gene may come in several varieties (alleles) and there are a pair of alleles for every gene. If the alleles are alike, a person is homozygous for that gene. If the alleles are different, heterozygous.
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
atomic mass units |
|
electron shells |
|
protons |
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electrons |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.