7.6 how the chemical elements formed

Question 1

how are chemical elements formed? (2)

Answer 1

elements a heavy as iron are formed inside stars as a results of nuclear fusion

elements heavier than iron are formed in supernovas

Question 2

how do we know that our sun and solar system were formed from the debris of a supernova

Answer 2

heavy elements exist in our solar system (such a s uranium)

Question 3

how are chemical elements distributed through space

Answer 3

by a supernova