The Sun, HR Diagram, and Stellar Life Cycles Test

Label the layers of the Sun.

a

b

c

core

convection zone

radiation zone

The material inside the Sun is in the form of a

• solid

• liquid

• plasma

• ball of iron atoms

Stars that lie in different places on the main sequence of the H-R diagram differ from each other mainly by having different:

• compositions

• internal structure

• masses

• radial velocities

Where are you sure to find the stars with the lowest mass on any H-R diagram?

• among the white dwarfs

• among the stars at the top left of the main sequence

• among the stars at the bottom right of the main sequence

• among the supergiants

A star that is quite hot and has a very small radius compared to most stars is called

• a main-sequence star

• an O-type star

• a red giant

• a white dwarf

Which of the following is the largest (in diameter)?

• neutron star

• white dwarf

• red giant

• main sequence star

You are out on the beach, enjoying the warm sunshine with friends.  As you glance up at the Sun (only briefly we hope), the part of the Sun that you can see directly is called its:

• corona

• photosphere

• chromosphere

• core

What is the correct order of the layers of the sun? (from innermost to outermost)

• radiation zone

• core

• convection zone

• chromosphere and corona

• photosphere

Why is the core of a star so hot?

• it is where the fusion happens

• because it is the center

• because of its density

Tags

NGSS.HS-ESS1-1

What causes solar granules?

• convection cells

• radiation

• magnetic forces

• the solar wind