Unit 4 Review

A relatively large spherical body that orbits a star.

• Star 
• Planet
• Moon 

Which of the following is the largest?

• star
• universe
• cluster
• galaxy

Light Years are a measure of - 

• time
• speed
• distance
• light

________ holds all of the planets in orbit around the sun.

• Gravity
• String
• Bill Nye
• Duct tape

In the diagram given, what happens as we move to the left?

• Stars get larger
• Stars get colder
• Stars get hotter
• Stars get smaller

Which describes the location of star A correctly?

• Star A is less bright than the Sun and has a surface temperature above 25,000 K

• Star A is brighter than the Sun and has a surface temperature below 25,000 K

• Star A is less bright than the Sun and has a surface temperature of above 11,000 K

• Star A is brighter than the Sun and has a surface temperature below 11,000 K.

Which type of stars belong to spectral class K and have the lowest luminosity?

• Giants

• White Dwarfs

• Supergiants

• Main-Sequence stars

What is the nearest star to planet Earth

• Moon

• Sun

• Sirius

• Proxima Centauri

Our Sun is classified as an average star. This places it in the middle of which type of star on the HR diagram?

• Main sequence

• White dwarf

• Red giant

• Super giant

Which stars have the greatest luminosity according to this HR diagram?

• Hot white dwarf

• Hot main sequence star

• Cool super giant

• Cool giant