How are elements that are heavier than hydrogen spread throughout the universe?
and !

The early stars are massive and short-lived. They consume their hydrogen, helium and lithium and produce heavier elements. When these stars die with a bang they spread the elements of life, carbon and oxygen, throughout the universe. New stars condense and new planets form from these heavier elements.

Explanation:

no sé si entiendes español pero te daría la respuesta si lo supiera, pero lo siento mucho

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.