| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
The rate of vibration of sound is called:
period |
|
frequency |
|
amplitude |
|
volume |
The rate of vibration of sound is called frequency and is measured in hertz (Hz). One hertz is one repetition per second and sounds with high frequency have a higher pitch than sounds with lower frequency. Humans can hear sounds in the range of 20 Hz to 20 kHz.
In taxonomy, domains are the broadest classification of life. How many domains are there?
5 |
|
6 |
|
3 |
|
dozens |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
-40°F is how many °C?
\(-{40 \over 9}\) |
|
\({40 \over 9}\) |
|
-40 |
|
-8 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)
Which of these is not a phase in cell division?
megaphase |
|
anaphase |
|
interphase |
|
cytokinesis |
Cell division is the process by which cells replicate genetic material in the nucleus and consists of several phases, beginning with interphase and ending with cytokinesis.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
blood cells |
|
bronchioles |
|
diaphragms |
|
capillaries |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.