| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.16 |
| Score | 0% | 63% |
Water freezing or boiling is an example of which of the following?
heating |
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sublimation |
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cooling |
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phase transition |
A substance undergoes a phase transition when it moves from one state of matter to another, for example, when water freezes or boils.
The first step in the water cycle is:
reclamation |
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precipitation |
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evaporation |
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infiltration |
The water (hydrologic) cycle describes the movement of water from Earth through the atmosphere and back to Earth. The cycle starts when water evaporates into a gas from bodies of water like rivers, lakes and oceans or transpirates from the leaves of plants.
Which of the following is true about species groups?
a community is made up of a group of populations |
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an ecosystem is a biological population |
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a biome is a made up of a group of biospheres |
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a population is made up of a group of communities |
A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.
Which of the following does not filter air as part of the respiratory system?
pharynx |
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nasal cavity |
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trachea |
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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.
The rows of the Periodic Table of the Elements are called:
families |
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groups |
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shells |
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periods |
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.