Examlex
Which of the following is true concerning the properties of zinc polycarboxylate cements?
Ecological Efficiency
The efficiency with which energy is transferred from one trophic level to the next in an ecosystem. Typically only a small percentage of energy is passed on to the next level.
Trophic Level
A step in a food chain or food web, representing the position of organisms in the flow of energy through an ecosystem.
Percentage
A mathematical term representing a fraction of 100, used to describe proportions or ratios.
Fresh Water
Water that contains minimal amounts of dissolved salts, especially found in lakes, rivers, and streams, as opposed to salt water.
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