Why Are Specialized Foams Designed Solely for Use on Unignited

question 31

Multiple Choice

Why are specialized foams designed solely for use on unignited spills of hazardous liquids?

• A) The roll-on method is ineffective for hazardous liquids.
• B) A thick, viscous foam can form a heat-resistant blanket over burning liquid
• Surfaces.
• C) The US Department of Agriculture Forest Service requires specialized foams for hazardous materials.
• D) Unignited chemicals tend to change the pH of water or remove the water from fire fighting foam, making the foam ineffective.

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Definitions:

Character Displacement

Evolutionary phenomenon where differences among similar species whose distributions overlap geographically are accentuated in regions where the species co-occur and minimized where they do not, facilitating niche differentiation and avoiding competition.

Beak Sizes

Variations in the length, width, and shape of the beaks of birds, often correlating with their feeding habits and ecological niches.

Indicator Species

Organisms used to assess the health of an ecosystem because their presence, absence, or abundance reflects a specific environmental condition.