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Populations of Organisms in an Ecosystem

Across
Cloudiness or haziness of a fluid
Fog or haze combine with other air pollutants
Number of organisms in a particular area
Energy emitted by the sun
A measure of population per unit area
The measurement of heat of an object
The acidity or alkalinity of a substance
A group living in the same place
A vast, flat region of permanently frozen soil
Down
Movement from on place to another
Refers to microscopic bubbles in fluid
An individual animal, plant or single celled organism
The surroundings in which a thing lives
A community of organisms
Conditions of a particular area
Having little to no rain
Having to do with the tropics
A substance that has a poisonous effect