onk.7.2 Natural carbon recyclingADVANCEDSTANDARDScience understandingFOUNDATIONbushfire (n) a forestfire that is out ofcontralCarbon is the basis of all life on Earth. There is a fixed amount ofcarbon on Earth and this carbon is continuously recycled and reuscu.It takes carbon about 100 million vears to complete one cycle throughthe lithosphere (rock, soil, land), bydrosphere (oceans, lakes, rivers), theatmosphere and the biosphere.controlled burn In) asupervised fireCarbon storesHINTThe Earth's four major carbon stores (or sinks) are-the atmosphere,occans, terrestrial ecosystems (on land) and Earth's crust.1 Gigatonne =10 tonne = 10" kgTable 7.2.1 Earth's principal carbon stores in gigatonnes (Gt)Stores of carbonGigatonnes (Gt)Gigatonnes (Gt)Stores of carbonmarine sediments and3000sedimentary rocks66000 000-100 000 000coaldeep oceanssoils and organic matter160040 000surface oceans1000oil and gas300vegetation540-610the atmosphere750Plants and the carbon cyclePlants absorb carbon dioxide from the atmosphere through photosynthesis. Some carbon isreturned to the atmosphere almost immediately through respiration. The remainder is used to buildleaves, wood and roots, and may be stored for hundreds of years either as the tree itself or in woodproducts made from it, such as the frames of houses or furniture.Plant litter (fallen leaves and twigs) and roots become part of the soil when decomposer organismsPlantbreak them down. As the litter is broken down, carbon is released into the atmosphere.Bushfires, controlled burns or using firewood to heat homes rapidly releases stored carbon into theatmosphere. Most of the carbon will be in the form of carbon dioxide. There may also be carbonmonoxide and methane, depending on the conditions of burning. Following burning, carbon mayalso be added to the soil in the form of charcoal, which remains stable for many years.Name the Earth's four major stores of carbon. TelreTmalatwosphere1ecoustenlust.OceansUse the data about carbon stores in Table 7.2.1 and rewrite the carbon stores, ranking themfrom the largest to the smallest storage.LargestSmallest3Which do you think is the most stable store? Explain,4Which store do you think changes most rapidly? Explain,RATE MY UNDERSTANDINGShade the face thet shows youur ratingPEARSON SCIENCE 10 2ND EDITION 7.3 The carbon cycleName the human activity that is responsible for the greatest change to the amount of carbonavailable for cycling.buming of fossil fuels such ascoal, oil anel gas.O Explain how farming cattle to provide meat and milk may change the amount of carbon inthe atmosphere.3O Analyse the information provided about how human activity changes the carbon cycle. Onthe diagram of the carbon cycle below:4.Tai colour in red the arrows that represent movements of carbon that would be increased byhuman activity(b) colour in blue the arrows that represent movements of carbon that would be reduced byhuman activitycarbon dioxidein airburning of fossil fuelsfor vehicles, electricity and heatburning of forestsfuel wood andorganic debrisphotosynthesiscarbon storedin plant tissueterestrial food chainscarbon storedin animal tissuerespirationdecomposerswasted, dead organisms imecoalphotosynthesis(aquatic food chaina)oil and gastimeorganic sedimentsformation olfossi tuelstimecalcareoussedimentsformatiohrotlimestone anddolomite(c) number each coloured arrow and explain the human activity involved and how theactivity would bring about change.RATE MY UNDERSTANDINGShade the face that shows your ratingPEARSON SCIENCE 10 2ND EDITION

Question

onk.7.2 Natural carbon recyclingADVANCEDSTANDARDScience understandingFOUNDATIONbushfire (n) a forestfire that is out ofcontralCarbon is the basis of all life on Earth. There is a fixed amount ofcarbon on Earth and this carbon is continuously recycled and reuscu.It takes carbon about 100 million vears to complete one cycle throughthe lithosphere (rock, soil, land), bydrosphere (oceans, lakes, rivers), theatmosphere and the biosphere.controlled burn In) asupervised fireCarbon storesHINTThe Earth's four major carbon stores (or sinks) are-the atmosphere,occans, terrestrial ecosystems (on land) and Earth's crust.1 Gigatonne =10 tonne = 10&#34; kgTable 7.2.1 Earth's principal carbon stores in gigatonnes (Gt)Stores of carbonGigatonnes (Gt)Gigatonnes (Gt)Stores of carbonmarine sediments and3000sedimentary rocks66000 000-100 000 000coaldeep oceanssoils and organic matter160040 000surface oceans1000oil and gas300vegetation540-610the atmosphere750Plants and the carbon cyclePlants absorb carbon dioxide from the atmosphere through photosynthesis. Some carbon isreturned to the atmosphere almost immediately through respiration. The remainder is used to buildleaves, wood and roots, and may be stored for hundreds of years either as the tree itself or in woodproducts made from it, such as the frames of houses or furniture.Plant litter (fallen leaves and twigs) and roots become part of the soil when decomposer organismsPlantbreak them down. As the litter is broken down, carbon is released into the atmosphere.Bushfires, controlled burns or using firewood to heat homes rapidly releases stored carbon into theatmosphere. Most of the carbon will be in the form of carbon dioxide. There may also be carbonmonoxide and methane, depending on the conditions of burning. Following burning, carbon mayalso be added to the soil in the form of charcoal, which remains stable for many years.Name the Earth's four major stores of carbon. TelreTmalatwosphere1ecoustenlust.OceansUse the data about carbon stores in Table 7.2.1 and rewrite the carbon stores, ranking themfrom the largest to the smallest storage.LargestSmallest3Which do you think is the most stable store? Explain,4Which store do you think changes most rapidly? Explain,RATE MY UNDERSTANDINGShade the face thet shows youur ratingPEARSON SCIENCE 10 2ND EDITION 7.3 The carbon cycleName the human activity that is responsible for the greatest change to the amount of carbonavailable for cycling.buming of fossil fuels such ascoal, oil anel gas.O Explain how farming cattle to provide meat and milk may change the amount of carbon inthe atmosphere.3O Analyse the information provided about how human activity changes the carbon cycle. Onthe diagram of the carbon cycle below:4.Tai colour in red the arrows that represent movements of carbon that would be increased byhuman activity(b) colour in blue the arrows that represent movements of carbon that would be reduced byhuman activitycarbon dioxidein airburning of fossil fuelsfor vehicles, electricity and heatburning of forestsfuel wood andorganic debrisphotosynthesiscarbon storedin plant tissueterestrial food chainscarbon storedin animal tissuerespirationdecomposerswasted, dead organisms imecoalphotosynthesis(aquatic food chaina)oil and gastimeorganic sedimentsformation olfossi tuelstimecalcareoussedimentsformatiohrotlimestone anddolomite(c) number each coloured arrow and explain the human activity involved and how theactivity would bring about change.RATE MY UNDERSTANDINGShade the face that shows your ratingPEARSON SCIENCE 10 2ND EDITION

Accepted Answer

1. four major store of carbon is:

Atmosphere
Oceans
Terrestrial ecosystem
earth's crust

2. Rewrite…