4.3 The Carbon Cycle

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Biology

IB Biology (SL)

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12 Terms

1
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Review: Importance of Light, Ecosystems, Community, and Biospheres

Light from sun is initial energy source for most communities

Ecosystem - a community and its abiotic environment

Community - a group of organisms living and interacting with each other in an area

Biosphere - made up of interrelated and interdependent ecosystems

<p>Light from sun is <strong><span style="color: yellow">initial energy source</span></strong> for most communities</p><p><strong><mark data-color="yellow">Ecosystem</mark></strong> - a community and its abiotic environment</p><p><strong><mark data-color="yellow">Community</mark></strong> - a group of organisms living and interacting with each other in an area</p><p><strong><mark data-color="yellow">Biosphere</mark></strong> - made up of interrelated and interdependent ecosystems</p>
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What are examples of Habitats?

  • Forests

  • Marine

  • Tundra

  • Grassland

  • Freshwater

  • Desert

3
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What abiotic elements would affect ecosystems?

  • rainfall

  • temp.

  • soil pH

  • minerals

4
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What nutrients (which are cycled through ecosystems) were mentioned in the lesson?

  • Carbon

  • Oxygen

  • Water

  • Phosphorus

  • Nitrogen

  • Sulfur

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Energy can enter and leave an ecosystem, but nutrients must be _________

recycled

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What processes are involved in the interaction between all biospheres?

photosynthesis, respiration+decomposition fossilization, and combustion.

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How does Photosynthesis affect carbon in Biosystems?

atmospheric CO2 is used to produce organic compounds in autotrophs (mostly plants and algae)

<p>atmospheric CO<sub>2</sub> is used to produce organic compounds in autotrophs (mostly plants and algae)</p>
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How does Consumption affect carbon in Biosystems?

Heterotrophs consume these compounds and incorporate them into their bodies.

<p>Heterotrophs <strong><span style="color: red">consume</span></strong> these compounds and <strong><span style="color: purple">incorporate</span></strong> them into their bodies.</p>
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How does Respiration+ Decomposition affect carbon in Biosystems?

releases carbon compounds back into the atmosphere

(like me after doing 3 pushups 😋)

<p><strong><span style="color: blue">releases</span></strong> carbon compounds back into the atmosphere</p><p>(like me after doing 3 pushups <span data-name="savoring_food" data-type="emoji">😋</span>)</p>
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How does Fossilization affect carbon in Biosystems?

When organisms die, some of the carbon compounds are fossilized and therefore sequestered (stored) in the earth.

<p>When organisms <strong><span style="color: red">die</span></strong>, some of the carbon compounds are fossilized and therefore <strong><span style="color: purple">sequestered (stored)</span></strong> in the earth.</p>
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How do Combustion affect carbon in Biosystems?

When fossil fuels and other organic materials are burned, carbon compounds are released into the atmosphere.

<p>When fossil fuels and other organic materials are <strong><span style="color: red">burned</span></strong>, carbon compounds are <strong><span style="color: yellow">released</span></strong> into the atmosphere.</p>
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The Diagram to Memorize

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