文稿分析讲稿neng tz0 xx markscheme environmental systems and societies paper.pdfVIP

–6–N11/4/ENVSO/SP1/ENG/TZ0/XX/M

1.(a)(acidrainwouldlowerthepHwhichwould)decreaseavailabilityofpotassium;

(acidrainwouldlowerthepHwhichwould)increaseavailabilityofcopper;[2]

(b)decreaseinorganicstoreofnitrogen/increaseininorganicstoreofnitrogen/

decreaseinsoilfertility;

reducedgrowthofproducers/lowerprimaryproductivity;

lessbiomass/energytosupportfoodchains;

increaseinplantsadaptedtolownitrogen/increaseinplantsusingalternative

sourcesofnitrogen(e.g.insectivorousplants);

increaseinplantsabletorecyclenitrogeninternally;

reductioninammonification;

reductioninnitrification;[3max]

Donotacceptaccountsoforganicdecomposition,becausenitrogen-fixing

bacteriaarenotrelevanttothedecompositionoforganicmaterial.

(c)Award[1]forname/identificationofstrategyand[1]fordescriptionofstrategy.

e.g.reductionoffossilfueluse;

throughswitchingtorenewablesources/conservationcampaigns;

or

e.g.additionofcalciumcarbonate/limetosoils;

raisesthepH;

or

e.g.smokestackscrubbers;

removessulfurcompounds/pollutantsatthesource;