How does conservation of matter relates to Conservation od energy?

Question

Please explain the difference and similarities between the two.

Answer 1

Conservation of mass refers to the fact that through any chemical or phsyical process, matter cannot be created nor destroyed, only changed. Conservation of energy means to reduce the amount of energy we use by changing our lifestyle slightly.

Answer 2

Mass is not conserved. If it were, no one would know who the blazes Albert Einstein was.