The life cycle a star will go through depends on the star's _____.

Our Sun is currently in what phase of its life cycle.

Our Sun is currently 4.6 _____ years old.

Massive stars stay in the main sequence for _____ of years.

Supernovas last _____ of years

What are the 2 possible final stages of a high mass star. Check all that apply.

What are the last names of the scientists who developed the H-R Diagram?

What 2 measurable qualities of stars are plotted on the axis of the H-R Diagram? Check all that apply.

Using the H-R diagram astronomers can know a star’s internal structure and evolutionary stage simply by determining its position in the diagram.

A star in the main sequence is a star that ____. Check all that apply.

A White Dwarf is a small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula.

What 2 forces are balances in a star that is in the main sequence of its life cycle? Check all that apply.

Fusion reactions take place faster in _____.

As fusion takes place in stars, heavier and heavier elements are produced.

Most of the energy in the Universe is produced as stars undergo fusion.

Elements heavier than iron are produced in normal star nucleosynthesis (fusion).

More than likely, you are made up of star dust.