Environmental Science
A graphic representation of number of individuals of different species belonging to each trophic level in a an ecosystem is known as

Ecological pyramid
Pyramid of biomass
Pyramid of number
Pyramid of energy

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Environmental Science
The air temperature is 45o F, the wind is blowing at 30 MPH, and the wind chill temperature is 15o F. These conditions would be equivalent to:

A 15o F air temperature and 30 MPH winds
A 15o F air temperature and 0 MPH winds
A 30o F air temperature and 15 MPH winds
A 30o F air temperature and 45 MPH winds

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Environmental Science
The wind-chill factor:

Relates body heat loss with wind to an equivalent temperature with no wind
Takes into account humidity and air temperature in expressing the current air temperature
Determines how low the air temperature will be on any given day
Tells farmers when to protect crops from a freeze
Indicates the temperature at which water freezes on exposed skin

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