| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
Convert -20C° to F°.
-4 |
|
-36 |
|
36 |
|
78 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(-20) + 32\)
\(F° = {-180 \over 5} + 32\)
\(F° = -36 + 32 = -4\)
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
bronchioles |
|
capillaries |
|
diaphragms |
|
blood cells |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.
The transfer of heat by the circulation or movement of the heated parts of a liquid or gas is called:
diffusion |
|
conduction |
|
convection |
|
radiation |
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.
The ozone layer is in which of Earth's atmospheric layers?
troposphere |
|
stratosphere |
|
mesosphere |
|
thermosphere |
The stratosphere is just above the troposphere and is stratified in temperature with warmer layers higher and cooler layers closer to Earth. This increase in temperature is a result of absorption of the Sun's radiation by the ozone layer.
Which of blood component carries oxygen?
plasma |
|
white blood cells |
|
red blood cells |
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platelets |
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.