Fission

Fusion

Combustion

Earth's core

Sun

Atmosphere

H --> He fusion (hydrogen to helium)

He --> C fusion (helium to carbon)

He --> C --> O fusion (helium to carbon to oxygen)

fission

Produce larger materials from the collision of smaller materials.

Release energy.

Produce smaller materials from the collision of larger materials.

Produce larger materials from the collision of smaller materials & Release energy

Absorb energy

Maintain energy

Release energy