Zadanie 11a
Wzorowane na: Chemistry SL Paper 3, May 2023, TZ2, pytanie 11(a). Treść, dane i kontekst są zmienione; sprawdzane umiejętności, format i punktacja jak w oryginale.
Darmowe konto pozwoli wrócić do niego później.
Polecenie
(i) Write the balanced equation for photosynthesis, in which glucose is formed.
(ii) Explain how the large-scale planting of fast-growing trees is intended to reduce the rate of global warming.
Sprawdź rozwiązanieUkryj rozwiązanieKlucz i punktacja
Odpowiedź z klucza
(i) 6 CO2(g) + 6 H2O(l) → C6H12O6(aq) + 6 O2(g) ✔
(ii) trees remove/absorb carbon dioxide from the atmosphere «by photosynthesis, storing the carbon in biomass» ✔
carbon dioxide is a greenhouse gas, so a lower concentration reduces the greenhouse effect/the energy retained by the atmosphere ✔
Schemat punktowania
(i) [1]: a balanced equation is required; ignore state symbols; "light" or "chlorophyll" over the arrow is accepted. (ii) M1: removal of carbon dioxide. M2: the link between a lower carbon dioxide concentration and the greenhouse effect. "Carbon capture" alone does not earn M1.