| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.19 |
| Score | 0% | 64% |
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
compound |
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element |
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molecule |
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atom |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
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.
Which of the following is not a medium for sound waves?
vacuum |
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liquid |
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none of these is a medium for sound waves |
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solid |
A vibrating object produces a sound wave that travels outwardly from the object through a medium (any liquid or solid matter). The vibration disturbs the particles in the surrounding medium, those particles disturb the particules next to them, and so on, as the sound propagates away from the vibration.
When two air masses meet and neither is displaced, what kind of front is present?
cold |
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stationary |
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warm |
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occluded |
When two air masses meet and neither is displaced, a stationary front is created. Stationary fronts often cause persistent cloudy wet weather.
Which of the following is not true about simple magnets?
opposite poles repel each other |
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all of these are untrue |
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same poles repel each other |
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opposite poles attract each other |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.