| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
A transition zone between two air masses is called:
thunderstorm |
|
front |
|
fog |
|
boundary |
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.
In the food chain, consumers are classified as which of the following?
primary |
|
all of these |
|
secondary |
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tertiary |
Most animals consume other organisms to survive. Consumers (heterotrophs) are divided into three types, primary, secondary, and tertiary, based on their place in the food chain.
Earth's history is divided into time periods, which of these is the shortest time period?
age |
|
epoch |
|
period |
|
eon |
The Earth is approximately 4.6 billion years old and its history is divided into time periods based on the events that took place and the forms of life that were dominant during those periods. The largest graduation of time is the eon and each eon is subdivided into eras, eras into periods, periods into epochs, and epochs into ages.
What part of the nervous system is responsible for controlling involuntary actions like breathing, swallowing, and heartbeat?
cerebellum |
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cerebrum |
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medulla |
|
spinal cord |
Part of the brainstem, the medulla is the connection between the brain and the spinal cord. It controls involuntary actions like breathing, swallowing, and heartbeat.
Convert 0C° to F°.
32 |
|
0 |
|
16 |
|
-32 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)