Environmental Science
The atmosphere near the earth's surface is "heated from below." Which of the following does not significantly contribute to this heating?

Convection from a hot surface
Heat energy from the earth's interior
Conduction of heat upward from a hot surface
Absorption of infrared energy that has been radiated from the surface

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Environmental Science
Which of the following regarding ecological pyramids is not correct?

In most ecosystems, the pyramid of numbers and biomass are up right
In tree dominated ecosystem the pyramid of numbers is inverted
The pyramid of energy expresses mainly the rate of food production
In deep water ecosystem, the pyramid of biomass is upright
The total energy flow at successive tropical level always decreases

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Environmental Science
During the winter solstice in the Northern Hemisphere:

At middle latitudes in the Northern Hemisphere, this marks the longest night of the year
The noon sun is overhead at 23.5o S latitude
Astronomical winter begins in the Northern Hemisphere
All of these

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