Answer:
D
Explanation:
Supernovae are an explosion of stars, during star death. During the life cycle of a star, it gravitation pull of its core squeezes lighter atoms such as hydrogen into heavier atoms like helium and carbon. When the stars explode in a supernova, these elements are jettisoned out forcefully into outer space even up to speeds of 25,000 miles/second.
Answer:
D. When a star explodes as a supernova elements that are heavier than hydrogen spread throughout the universe.
Explanation:
