| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.79 |
| Score | 0% | 56% |
Which of the following is not a medium for sound waves?
vacuum |
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none of these is a medium for sound waves |
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solid |
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liquid |
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.
In the classification of life, bacteria, archaea and eukaryota are which of the following?
domains |
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species |
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classes |
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kingdoms |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
stratus clouds |
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nimbus clouds |
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cirrus clouds |
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cumulus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
In the food chain, omnivores may be which of the following?
primary or tertiary consumers |
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secondary consumers or scavengers |
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primary or secondary consumers |
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secondary or tertiary consumers |
Secondary or tertiary consumers may be omnivores.
The universal recipient blood type can recieve any other blood type. Which blood type is the universal recipient?
O-negative |
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O |
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AB |
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AB-positive |
Blood transfer is limited by the type and Rh factor of the blood. Someone who has Rh-factor negative blood cannot receive blood with a positive type but a person with Rh-factor positive type blood can receive Rh-negative blood. Type O negative blood is the universal donor because it can be given to a person with any blood type. Type AB positive is the universal recipient meaning someone with this blood type can receive any other type of blood.