| 25.1 The Short-Term Carbon Cycle
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| Photosynthesis and respiration are key processes in short-term carbon cycling.
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| The regular oscillation of CO2 reflects the seasonality of photosynthesis in the Northern Hemisphere.
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| Human activities play an important role in the modern carbon cycle.
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| Carbon isotopes show that much of the CO2 added to air over the past half century comes from burning fossil fuels.
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| 25.2 The Long-Term Carbon Cycle
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| Reservoirs and fluxes are key in long-term carbon cycling.
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| Physical processes add and remove CO2 from the atmosphere.
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| Records of atmospheric composition over 400,000 years show periodic shifts in CO2 content.
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| DLAP questions | morris2e_ch25_10_dlap.xml | 561d330a757a2e875f000000 |
| Variations in atmospheric CO2 over hundreds of millions of years reflect plate tectonics and evolution.
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| DLAP questions | morris2e_ch25_11_dlap.xml | 561d330a757a2e875f000000 |
| 25.3 The Carbon Cycle: Ecology, Biodiversity, and Evolution
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| DLAP questions | morris2e_ch25_12_dlap.xml | 561d330a757a2e875f000000 |
| Food webs trace the cycling of carbon through communities and ecosystems.
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| DLAP questions | morris2e_ch25_13_dlap.xml | 561d330a757a2e875f000000 |
| Biological diversity reflects the many ways that organisms participate in the carbon cycle.
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| DLAP questions | morris2e_ch25_14_dlap.xml | 561d330a757a2e875f000000 |
| The carbon cycle weaves together biological evolution and environmental change through Earth history.
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| DLAP questions | morris2e_ch25_15_dlap.xml | 561d330a757a2e875f000000 |
| DLAP questions | morris2e_ch25_16_dlap.xml | 561d330a757a2e875f000000 |