| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.35 |
| Score | 0% | 67% |
Small rocks shed by asteroids and comets that reach the earth are called:
meteoroids |
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shooting stars |
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meteors |
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meteorites |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
A transition zone between two air masses is called:
front |
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boundary |
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thunderstorm |
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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.
When two air masses meet and neither is displaced, what kind of front is present?
occluded |
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warm |
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stationary |
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cold |
When two air masses meet and neither is displaced, a stationary front is created. Stationary fronts often cause persistent cloudy wet weather.
Herbivores are __________ that subsist on producers like plants and fungus.
primary consumers |
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scavengers |
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tertiary consumers |
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secondary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
The formula for acceleration is which of the following?
\(\vec{a} = { \vec{F} \over m }\) |
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\(\vec{a} = { m \over F }\) |
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\(\vec{a} = { m \over \vec{F} }\) |
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\(\vec{a} = \vec{F} m\) |
Newton's second law of motion leads to the formula for acceleration which is a measure of the rate of change of velocity per unit time and, if you solve for positive acceleration, reveals how much net force is needed to overcome an object's mass. The formula for acceleration is \(\vec{a} = { \vec{F} \over m }\) or, solving for force, \(\vec{F} = m\vec{a}\).