Science Single Award - 4SS0 PearsonEdexcel

Cycles Within Ecosystems

Gbogbo ọrọ náà

Carbon is the backbone of every organic molecule in every living organism, yet there is a fixed amount of it on Earth. The carbon cycle describes how this element moves continuously between the atmosphere, living organisms, the oceans, and the ground, recycled over and over again.

In this lesson you will trace carbon through the four key processes that drive the cycle: photosynthesis, respiration, decomposition, and combustion. Understanding the carbon cycle also helps explain why burning fossil fuels is altering the composition of the atmosphere.

Ebumnobi

  1. Describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion

Maapụ uche

E seela isiokwu a ka ị hụ otu echiche si ejikọta.

Mepee maapụ uche na ngwa

Kaadị ncheta

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Mee omume kaadị ndị a na ngwa

Akwụkwọ Ọmụmụ

Every atom of carbon in your body was once in the atmosphere as carbon dioxide. A plant absorbed it during photosynthesis, an animal ate the plant, and eventually the carbon reached you through food. When you breathe out, some of that carbon returns to the air as CO₂. This endless loop is the carbon cycle.

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Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na Cycles Within Ecosystems. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  1. Which process in the carbon cycle removes CO2 from the atmosphere? A) Respiration B) Combustion C) Photosynthesis D) Decomposition Answer: C
  2. Decomposers release CO2 into the atmosphere by: A) Photosynthesis B) Combustion C) Respiration D) Condensation Answer: C
  3. Which of the following is a fossil fuel? A) Wood B) Coal C) Ethanol D) Hydrogen Answer: B
  4. Deforestation increases atmospheric CO2 because: A) Trees produce CO2 B) Fewer trees means less photosynthesis to absorb CO2 C) Animals move away from the area D) Soil temperature drops Answer: B
  5. Which organisms are the main decomposers in ecosystems? A) Plants and algae B) Insects and worms C) Bacteria and fungi D) Fish and birds Answer: C

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Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Cycles Within Ecosystems? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.

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