Of the total energy intercepted at Earth's surface and available for work, only about ________ is actually fixed by photosynthesis

A) 1%
B) 5%
C) 10%
D) 15%


A

Environmental & Atmospheric Sciences

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In terms of food chains, which of the following is a producer?

A. grass B. giraffe C. beetle D. salmon

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The general chemical equation for photosynthesis is shown below. Through this reaction, are the oxygens of the water molecules, H2O, oxidized or reduced? 6 CO2 + 6H2O ? C6H12O6 + 6 O2

A. The oxygens of the water molecules are oxidized. B. The oxygens of some of these water molecules are oxidized, while others are reduced. C. The oxygens of the water molecules are reduced. D. The oxygens of the water molecules are neither oxidized nor reduced.

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Phoenician sailors were more skilled then Greek sailors, so they ventured beyond the sight of land for trade on a regular basis

Indicate whether the statement is true or false

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This process involves the movement of a mass or substance

conduction convection radiation all of these

Environmental & Atmospheric Sciences