Question 19N.2.SL.TZ0.8c
| Date | November 2019 | Marks available | [Maximum mark: 7] | Reference code | 19N.2.SL.TZ0.8c |
| Level | SL | Paper | 2 | Time zone | TZ0 |
| Command term | Explain | Question number | c | Adapted from | N/A |
Explain the movement of energy and inorganic nutrients in an ecosystem.
[7]
a. autotrophs/producers/plants obtain inorganic nutrients from the «abiotic» environment ✔
b. energy is provided «mainly» by sunlight ✔
c. light energy is converted «to chemical energy» through photosynthesis✔
d. photosynthesis/producers/autotrophs convert inorganic carbon/carbon dioxide and water into carbon/organic compounds ✔
e. carbon compounds/foods contain/are a source of «usable» energy «for life» ✔
f. carbon compounds/energy are transferred along food chains when eaten by consumers/heterotrophs ✔
g. respiration returns carbon «dioxide» to the environment ✔
h. respiration releases stored/chemical energy as heat/ATP ✔
i. energy/ATP is used to carry out life functions/synthesis/growth/movement ✔
j. energy is lost/is not recycled ✔ Both related by “or” required.
k. nutrients are recycled / example of recycled nutrient e.g. carbon ✔
l. decomposers recycle minerals/inorganic nutrients ✔
Award [5 max] if only energy is mentioned.
