Lesson 6.3 Origin and Evolution of the Universe Answers

Scientists discovered that stars in the universe are mostly composed of which elements?

According to the big bang theory, which describes the universe before the actual big bang occurred?

The presence of which element would indicate that a star is going through a high-mass star life cycle as opposed to a low-mass star life cycle?

Which of these forms as part of the life cycles of both low-mass and high-mass stars as a result of a star-forming nebula collapsing and spinning?

The chart shows characteristics of stars.Sirius is a blue-white star with a surface temperature of about 9800 K.What is most likely the mass of Sirius?

Kathy drew a timeline to show some of the major events that occurred during the evolution of the universe.Which best describes Kathy’s error?

After the supernova in a star’s life cycle, what else is formed in addition to a nebula?

Daniel observed and compared some stars at night and recorded his observations in a chart.Daniel later discovered that star X is farther away from Earth than the other stars he observed, and star Z is closest to Earth.

Which describes redshifts? Check all that apply.

Bethany and Joquin are discussing theories about the universe. Bethany believes that since the beginning of the universe, galaxies have been moving, and will continue to move, toward Earth. Joquin argues that galaxies have been moving away from Earth.