Question

match the vocabulary word with the correct definition.
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unit expressing a ratio of a solute in a solution
large, naturally occurring ecological levels occupying a major habitat; include aquatic, forest, grassland and wetland
any living organism
smaller community where biotic and abiotic elements interact within a biome

biotic # parts per thousand (ppt) # ecosystem # biomes

Explanation:

1. "Parts Per Thousand (ppt)" is a unit expressing a ratio of a solute in a solution.
2. "Biomes" are large, naturally - occurring ecological levels occupying a major habitat, including aquatic, forest, grassland and wetland.
3. "Biotic" refers to any living organism.
4. "Ecosystem" is a smaller community where biotic and abiotic elements interact within a biome.

Answer:

1. unit expressing a ratio of a solute in a solution: Parts Per Thousand (ppt)
2. large, naturally occurring ecological levels occupying a major habitat, include aquatic, forest, grassland and wetland: Biomes
3. any living organism: Biotic
4. smaller community where biotic and abiotic elements interact within a biome: Ecosystem