IB Biology HL C4.2.19 Co Release During Combustion Topic Practice

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Study C4.2.19—CO₂ release during combustion conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

Question 1

[Maximum number: 3]

The graph shows global CO2\mathrm{CO}_{2} contributions from the use of fuels since 1825. Emissions estimates for the years since 1950 are based on energy data from the United Nations while emissions estimates for years prior to 1950 have been constructed using a variety of sources.

Figure for Question 1 — IB Biology HL

Question (a)

(a)

Calculate the percentage increase in the use of liquid fuels from 1950 to 1975.

[ 1 ]

Question (b)

(b)

Referring to the data, compare and contrast the changes in the use of the different fuels between 1950 and 1975.

[ 2 ]
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