| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
reflection |
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conduction |
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radiation |
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convection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
A major difference between sound waves and light waves is which of the following?
a sound wave is mechanical while a light wave is electromagnetic |
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a sound wave cannot travel through a vacuum |
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all of these are correct |
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a sound wave is much slower than a light wave |
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 the clouds become too saturated with water, the water is released as precipitation in the form of:
snow |
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ice |
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snow or ice |
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rain |
Rising into the atmosphere, the water condenses into clouds. When the clouds become too saturated with water, the water is released as snow or ice precipitation which may warm as it falls to reach Earth as rain.
What part of the food chain serves only as food for other organisms?
producers |
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secondary consumers |
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decomposers |
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primary consumers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis
In the heart, the __________ artery and vein manage blood flow to the lungs.
atrial |
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aorta |
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capillary |
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pulmonary |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.