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Questions and Answers
What is the characteristic of organic carbon?
What is the characteristic of organic carbon?
- It is reduced carbon that stores energy and is combined with carbon, hydrogen, or nitrogen atoms (correct)
- It is a source of CO2 for the atmosphere depending on circulation and productivity regime
- It diffuses along a concentration gradient from higher to lower concentrations
- It is oxidized carbon combined with oxygen, such as in CO2 gas or CaCO3 minerals
Where does the process of CO2 combining with water to form carbonic acid occur?
Where does the process of CO2 combining with water to form carbonic acid occur?
- In the atmosphere and soil
- In rainwater and seawater (correct)
- In biomass and fossil fuel
- In the Earth's crust and mantle
What are the carbon reservoirs near the Earth's surface primarily composed of?
What are the carbon reservoirs near the Earth's surface primarily composed of?
- Organic carbon in the form of biomass, fossil fuel, and kitchen compost
- Inorganic carbon in the form of CH4 and NO2
- Inorganic carbon in the form of CO32-, CaCO3, and HCO3- (correct)
- Carbonic acid and CO2 gas
What are the main minerals found in carbonates?
What are the main minerals found in carbonates?
What is the chemical formula for carbonic acid?
What is the chemical formula for carbonic acid?
What process eats away at carbonate and silicate rocks to produce bicarbonate ions, dissolved silica, and calcium ions?
What process eats away at carbonate and silicate rocks to produce bicarbonate ions, dissolved silica, and calcium ions?
What promotes the diffusion of CO2 back to the atmosphere according to the text?
What promotes the diffusion of CO2 back to the atmosphere according to the text?
What is the net effect of limestone weathering on land and carbonate mineral formation & burial in the ocean?
What is the net effect of limestone weathering on land and carbonate mineral formation & burial in the ocean?
What is the approximate rate of CO2 removal by the combined processes of silicate weathering on land and carbonate mineral deposition in the ocean?
What is the approximate rate of CO2 removal by the combined processes of silicate weathering on land and carbonate mineral deposition in the ocean?
What provides the return flow to balance the CO2 removal from silicate weathering on long time-scales?
What provides the return flow to balance the CO2 removal from silicate weathering on long time-scales?
What is the surface temperature of Venus according to the text?
What is the surface temperature of Venus according to the text?
What is the approximate surface temperature of Earth according to the text?
What is the approximate surface temperature of Earth according to the text?
What diminishes the effect of disturbances according to the text?
What diminishes the effect of disturbances according to the text?
What is the main mineral found in silicates according to the text?
What is the main mineral found in silicates according to the text?
What is the main component of carbonate minerals according to the text?
What is the main component of carbonate minerals according to the text?
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