| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.93 |
| Score | 0% | 59% |
212°F is how many °C?
\(135 {5 \over 9}\) |
|
-100 |
|
100 |
|
0 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (212 - 32)\)
\(C° = {5 \over 9} (180) = {{180 \times 5} \over 9}\)
\(C° = {900 \over 9}\)
\(C° = 100\)
In the food chain, omnivores may be which of the following?
secondary or tertiary consumers |
|
primary or tertiary consumers |
|
secondary consumers or scavengers |
|
primary or secondary consumers |
Secondary or tertiary consumers may be omnivores.
An element in the physical state of __________ maintains neither a constant volume nor a constant shape.
solid |
|
gas |
|
plasma |
|
liquid |
The gaseous state occurs at a higher temperature range than the solid and liquid states of the same substance. In this state, molecules flow very freely around each other and will spread out as far as they're able. Gases maintain neither a constant volume nor a constant shape.
Which of the following temperatures is least like the others?
0K |
|
32°F |
|
absolute zero |
|
-273°C |
Absolute zero is the coldest possible temperature in the universe. In the Kelvin scale, absolute zero is 0K and in the Celsius scale it is -273°C.
Which part of the respiratory system helps protect against infection?
trachea |
|
nasal cavity |
|
epiglottis |
|
pharynx |
After air enters through the nose, it passes through the nasal cavity which filters, moistens, and warms it. Further filtering takes place in the pharynx, which also helps protect against infection, and then in the trachea which is just past the epiglottis, responsible for preventing food from entering the airway.