| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
A transition zone between two air masses is called:
front |
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thunderstorm |
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boundary |
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fog |
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.
Acceleration is the rate of change of velocity per unit of time. Which of these is the formula for acceleration?
\(\vec{a} = { t \over \Delta \vec{v} }\) |
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\(\vec{a} = { \Delta \vec{v} \over t }\) |
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\(\vec{a} = \Delta \vec{v} t \) |
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\(\vec{a} = { \vec{v} \over t }\) |
Acceleration is the rate of change of velocity per unit of time. In physics, the delta symbol (\(\Delta\)) represents change so the formula for acceleration becomes \(\vec{a} = { \Delta \vec{v} \over t }\)
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
protons |
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electrons |
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atomic mass units |
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electron shells |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
Which of the following does not filter air as part of the respiratory system?
trachea |
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pharynx |
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nasal cavity |
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epiglottis |
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 which prevents food from entering the airway.
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
cerebrum |
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cerebellum |
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brainstem |
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medulla |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).