Chemistry · Grades 9–12
Carbon chemistry and system accounting · Revision sheet
Track carbon atoms across reservoirs without treating transfers as disappearance.
Learn the idea
Reservoirs
Carbon occurs in air, water, living matter, soils and rocks in different chemical forms.
Transfer
A chemical or biological process can transfer carbon between reservoirs while conserving atoms.
Combustion model
Complete combustion of a hydrocarbon forms carbon dioxide and water in a simplified oxygen-sufficient model.
Boundary
A local decrease in one reservoir is not automatically a global removal.
Explain without looking
- Why should actual combustion emissions not be inferred solely from an ideal complete equation?
- Explain why reducing concentration in one location is not proof of reducing total global carbon.
Further reading and review references
These are reference links, not copied exercises, institutional endorsement or proof of independent review.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.