Question

the energy the sun produces varies depending on the stage of development. this also changes the elements found in the sun. the diagram shows part of the life cycle of a low - mass star like the sun.
how does energy production and the elements present in the star change during the life cycle? place each piece of data into the model next to the correct stage of the life cycle.
life cycle stage energy production elements present
main sequence star
red giant
planetary nebula
no significant fusion mostly hydrogen and helium
fusion in core mostly hydrogen, helium, oxygen, and carbon
fusion outside the core mostly hydrogen, helium, oxygen, and carbon

Explanation:

Step1: Match main sequence star

Energy Production: Fusion in core
Elements Present: Mostly hydrogen and helium

Step2: Match red giant

Energy Production: Fusion outside the core
Elements Present: Mostly hydrogen, helium, oxygen, and carbon

Step3: Match planetary nebula

Energy Production: No significant fusion
Elements Present: Mostly hydrogen, helium, oxygen, and carbon

Answer:

Life Cycle Stage	Energy Production	Elements Present
Red giant	Fusion outside the core	Mostly hydrogen, helium, oxygen, and carbon
Planetary nebula	No significant fusion	Mostly hydrogen, helium, oxygen, and carbon