H-R Diagram

Multiple Choice

On the HR Diagram temperature ________ as you move toward the _______ side of the chart.

• increases; left

• decreases; right

• decreases; left

• increases; right

Multiple Choice

On the HR Diagram brightness ________ as you move toward the _______ side of the chart.

• increases; bottom

• decreases; top

• decreases; bottom

• increases; top

Multiple Choice

The H-R diagram classifies stars based on what factors?

• Temperature and luminosity

• Number of planets

• What constellation they're in

• Temperature and fusion

Multiple Choice

90% of known stars are in what stage of their life cycle?

• Main sequence

• Red giant

• White dwarf

• Supernova

Multiple Choice

What section is considered the main sequence?

• Area M

• Area P

• Area X

• Area Z

Multiple Choice

Where are red giants?

• Area M

• Area P

• Area X

• Area Z

Multiple Choice

Compared to a white dwarf, a red supergiant is...

• Hotter and brighter

• Hotter and not as bright

• Colder and brighter

• Colder and not as bright

Multiple Choice

Our sun is what kind of star?

• Blue giant

• Red giant

• Main sequence

• White dwarf

Multiple Choice

Which area has the hottest, dimmest stars?

• Quadrant 1

• Quadrant 2

• Quadrant 3

• Quadrant 4

Multiple Choice

Where are white dwarfs?

• Area M

• Area P

• Area X

• Area Z

Multiple Choice

Stars that are farther to the right on the HR Diagram are usually

• Hotter

• Cooler

• Brighter

• Dimmer

Multiple Choice

The Hertzsprung-Russell diagram shows how the sun is classified among the stars.

A star that is several thousand times brighter than the sun with a temperature lower than 4,000 K would be classified as __________.

• a main-sequenced star in spectral class B

• a supergiant in spectral class K

• a main-sequence star in spectral class K or M

• a white dwarf in spectral class B