Question

which were predictions based on the big bang theory? choose three correct answers. hydrogen and helium exist in abundance leftover radiation exists from the big bang high - mass stars become neutron stars low - mass stars become white dwarfs the universe is still expanding

Explanation:

The Big Bang theory predicts three key observations: 1) Abundant hydrogen and helium (primordial nucleosynthesis), 2) Cosmic Microwave Background (leftover radiation), and 3) An expanding universe (Hubble's law confirmation). Star evolution outcomes (neutron stars/white dwarfs) are unrelated to Big Bang predictions.

Answer:

hydrogen and helium exist in abundance, leftover radiation exists from the big bang, the universe is still expanding