7.4 CO2 and Particulates

What sources should be examined in a study to determine the impact of a geologic source on levels of CO2 in the atmosphere?

Volcanoes

What is a natural source of atmospheric carbon dioxide?

Respiration, decomposition, forest fires, volcanoes.

A student is setting up a model to study the carbon cycle and natural sources of carbon dioxide. They create a microenvironment that contains soil, leaf debris, an earthworm, heterotrophic bacteria, and a sun lamp. What natural source of carbon dioxide and major metabolic process was left out of the model?

There is no representation of photosynthesis in the model environment. (NO leavsies) .

What is a natural process that adds carbon dioxide to the atmosphere?

Respiration, decomposition