| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.59 |
| Score | 0% | 52% |
The transfer of heat by the circulation or movement of the heated parts of a liquid or gas is called:
conduction |
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convection |
|
radiation |
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diffusion |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas. Examples of heat transfer by convection include water coming to a boil on a stove, ice melting, and steam from a cup of coffee.
Which of the following describes the Earth's outer core?
makes up most of the Earth's volume |
|
solid |
|
primarily solid |
|
liquid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
Within DNA, a variety of a particular gene is called a(n):
homozygous |
|
allele |
|
chromosome |
|
heterozygous |
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.
Which of the following does not represent the freezing point of water?
0°C |
|
32°F |
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273K |
|
0°F |
The Fahrenheit scale fixes the freezing point of water at 32°F, the Celsuis scale at 0°C, and the Kelvin scale at 273K.
Blood is delivered to bodily tissues through:
veins |
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capillaries |
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arterioles |
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plasma |
The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.