Environmental Science
Condensation nuclei may be:

Particles of dust
Smoke from forest fires
All of these
Salt from the ocean
Nitric acid particles

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Environmental Science
Which of the following statements is not correct?

A change in the air temperature can change the relative humidity.
The length of human hair changes as the relative humidity changes.
The relative humidity is a measure of the air's actual water vapor content.
During the winter, low relative humidity can irritate the mucus membranes in the nose and throat.

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Environmental Science
Which of the following statements regarding species interdependence are true? A. An association of two species where one is benefitted and other remains unaffected called mutualism B. An interspecific association where both partners derive benefit from each other is called commensalism C. A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation D. A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis

C and D only
A and B only
A and C only
B and C only
B and D only

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