It means energy outside of the system you are considering.
external energy to kinetic energy (maybe)
When heat is added to or is absorbed by a system, its internal energy increases. The amount of external work a system can do essentially refers to the amount of energy it can transfer to something else. So when internal energy increases, so does the external work done by the system.
Energy balance can be described by this equation : Energy intake = internal heat produced + external work + energy stored.
Endothermic.
open system
Earth has internal energy due to radioactivity. I am not sure what you mean by radioactive external energy, or simply by external energy. Earth gets most of its energy from the Sun.
solar energy
I added "external" to the question
solar energy
chloroplast
nuclear reactions in the Sun
what does external decoration mean
Chloroplast.
external energy to kinetic energy (maybe)
external energy to kinetic energy (maybe)
it includes the moon
External heat.