Origin and Evolution of the Universe Answers

Which statements describe some of the original ideas proposed about the universe during the big bang? Check all that apply.The universe exploded.The universe was opaque.The universe was one second old.The universe was very hot and dense.The universe expanded from a single point.

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Which were predictions based on the big bang theory? Select all that apply.leftover radiation exists from the big banglow-mass stars become white dwarfshigh-mass stars become neutron starshydrogen and helium exist in abundancethe universe is still expanding

Explain how hydrogen and helium nuclei were first formed in the universe.

Inflation: [___]

Describe three pieces of evidence that support the big bang theory.

Sample Response: Hydrogen and helium nuclei were formed in the universe through a process called nucleosynthesis. Deuterium (a hydrogen isotope) nuclei were formed when protons and neutrons combined. Neutrons combined with deuterium nuclei to form tritium. A proton would then fuse with tritium to form helium nuclei. What did you include in your response? Check all that apply.A process called nucleosynthesis formed the first hydrogen and helium atoms in the universe.When the protons and neutrons

Sample Response: The big bang theory is supported by the observation that the spectrum of nearly all galaxies is red-shifted, implying that the universe is still expanding. It is also supported by the discovery of the cosmic microwave background radiation, which is leftover radiation from the big bang. Finally, the big bang theory is supported by the discovery that the composition of stars is 99% hydrogen and helium, the only two elements that could have existed shortly after the big bang. What

Arcturus is a star whose surface temperature is 4290 K.

A star is observed to have a temperature of 3000 K and a luminosity of 105.

Identify the type of star that goes through these steps in their life cycles.