Cycles Within Ecosystems
Muhtasari
Carbon is the backbone of every organic molecule, yet there is only a fixed amount of it on Earth. The same carbon atoms that once formed the body of a dinosaur may now be part of a leaf, a lump of coal, or the air you are breathing out right now.
In this lesson you will trace the carbon cycle through its four main stages: photosynthesis, respiration, decomposition and combustion. You will see how carbon moves between the atmosphere, living organisms and fossil fuels, and why human activity is disrupting the balance.
Malengo
- Describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion
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Tathmini ya Somo
Hongera kwa kukamilisha somo la Cycles Within Ecosystems. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which process removes carbon dioxide from the atmosphere? A) Respiration B) Combustion C) Photosynthesis D) Decomposition Answer: C
- Fossil fuels are formed from: A) Volcanic rock compressed over time B) The remains of ancient organisms buried under heat and pressure C) Carbon dioxide dissolved in rainwater D) Sand and clay minerals compressed together Answer: B
- Decomposers return carbon to the atmosphere by: A) Photosynthesis B) Combustion C) Respiration D) Evaporation Answer: C
- Which of the following is NOT a stage in the carbon cycle? A) Photosynthesis B) Transpiration C) Respiration D) Combustion Answer: B
- Deforestation increases atmospheric CO2 because: A) Trees release CO2 when alive B) Fewer trees means less photosynthesis to absorb CO2 C) Decomposers stop working without trees D) Soil absorbs more CO2 without tree roots Answer: B
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Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
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Sehemu ya kitabu
Biogeochemical Cycles
Discuss the biogeochemical cycles of water, carbon, nitrogen, phosphorus, and sulfur
"Biology: Biogeochemical Cycles" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/46-3-biogeochemical-cycles. Access for free at https://openstax.org/books/biology/pages/1-introduction
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