H-R Diagram Quiz

Unit 7 Review

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Multiple Choice

In which region of the H-R Diagram would you be likely to find the brightest, reddest stars?

• W
• X
• Y
• The orange dashed line

Multiple Choice

The effective temperature of a star is related to its...

• solar system
• luminosity
• absolute magnitude
• color

Multiple Choice

Based on the diagram, Bernard's Star is -

• brighter than the Sun with a surface temperature of less than 3,800 K

• a main sequence star that is dimmer than the Sun with a temperature greater than 3,800 K

• dimmer than the Sun and yellow in color

• a red, main sequence star that is cooler and dimmer than our Sun

Multiple Choice

Based upon the diagram, which star would have a spectral class of M and have the highest luminosity?

• Main Sequence stars

• Giants

• Supergiants

• White Dwarfs

Multiple Choice

Which area on the diagram represents the Giants?

• Area M

• Area P

• Area X

• Area Z

Multiple Choice

Canopus is dimmer than Polaris

• True

• False

Multiple Choice

Sirius B is brighter than Mira

• True

• False

Multiple Choice

Tau Ceti is cooler that Regulus

• True

• False

Multiple Choice

Sirius is bigger than Arcturus

• True

• False

Multiple Choice

Supergiants are hotter than White Dwarfs.

• True

• False

Multiple Choice

The Sun is the largest star on the H-R Diagram

• True

• False

Multiple Choice

Luminosity of a star increases from

• right to left

• top to bottom

• left to right

• bottom to top

Multiple Choice

What is the surface temperature range associated with yellow stars?

• 6,000 - 7,500 K

• 5,200 - 6,000 K

• 3,700 - 5,200 K

• 2,400 - 3,700

Multiple Choice

A red star would also be considered -

• A star with a low temperature

• A star with the spectral class M

• A star with a high temperature

• A star with a low temperature and spectral class M

Multiple Choice

Spica is brighter than the Sun.

• True

• False

Multiple Choice

Compared to a red giant star, a blue supergiant is...

• Hotter and brighter

• Hotter and not as bright

• Colder and brighter

• Colder and not as bright

Multiple Choice

What kind of galaxy is this?

• Ring
• Irregular
• Spiral
• Elliptical 

Multiple Choice

What kind of galaxy is this?

• Peculiar
• Active Galaxy: Quasar
• Spiral
• Elliptical 

Multiple Choice

What kind of galaxy is this?

• Barred Spiral
• Irregular
• Spiral
• Elliptical 

Multiple Choice

Which of the following correctly places these in order from LARGEST to SMALLEST?

• galaxy -- local group/cluster -- planet -- solar system -- universe

• universe -- local group/cluster -- galaxy -- solar system -- planet

• planet -- solar system -- galaxy -- local group/cluster -- universe

• universe -- galaxy -- solar system -- local group/cluster -- planet

Multiple Choice

A galaxy which is either spherical (ball like) or a flattened disk is a ___ galaxy.

• elliptical

• humanoid

• irregular

• spiral

Multiple Choice

Which type of galaxies would most likely not have new stars?

• Spiral

• Elliptical

• Optical

• Irregular

Multiple Choice

Nuclear Fusion is...?

• A burnt out white dwarf star

• The combining of atomic nuclei

• A cloud of gas and dust

• A turkey

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

Which of the following is NOT a characteristic used to classify stars?

• Color
• Temperature
• Size
• Shape

Multiple Choice

Compared to the rest of the stars, our sun is considered...

• Extremely Large and Cold
• Small with a medium temperature
• Medium size with medium temperature

Multiple Choice

What is a theory?

• An educated guess

• Logical explanation of what naturally occurs

• A conclusion that has been tested many times and accepted as truth

• A systematic approach to solve a problem

Multiple Choice

electromagnetic waves with the longest wavelengths are

• gamma rays
• x-rays
• infrared waves
• radio waves

Multiple Choice

In visible light, which color has the longest wavelength?

• Red
• Violet
• Yellow
• Green

Multiple Choice

_____________________light is the only type of EM wave detected by the human eye.

• Red
• Gamma
• Microwave
• Visible

Multiple Choice

Which kind of wave has the greatest frequency?

• gamma rays
• infrared
• ultraviolet
• microwaves

Multiple Select

Which EM waves are invisible? (more than one correct answer)

• radio

• visible

• ultraviolet

• gamma rays

Multiple Choice

Which has the LONGEST wavelength and, therefore, the lowest frequency/energy

• Gamma Rays
• Radio Waves
• Visible Light
• Infrared rays

Multiple Choice

Which has the SHORTEST wavelength and, therefore, the highest frequency/most energy

• Radio waves
• Ultraviolet Rays
• Gamma Rays
• X-rays

Multiple Choice

Which color has the longest wavelength?

• Yellow

• Red

• Green

• Purple

Multiple Choice

The only force acting on the nebulae is ________.

• thermal
• singular
• gravity
• microscopic

Multiple Choice

After a supernova, the core can collapse into a neutron star, or if massive enough even a ___________.

• Black Hole
• White Dwarf
• Brown Dwarf
• Black Dwarf

Multiple Choice

All stars begin their life as a white dwarf

• true

• false

Multiple Choice

Which of the following list the correct order of the life cycle of massive stars?

• Nebula --> protostar --> main sequence --> red supergiant --> supernova --> blackhole
• Nebula --> protostar --> main sequence --> red giant --> planetary nebula --> white dwarf --> black dwarf
• Nebula --> protostar --> main sequence --> supernova --> red giant --> blackhole
• Nebula --> protostar --> blackhole --> red supergiant --> supernova --> main sequence

Multiple Choice

Which category is our Sun located in?

• White Dwarfs
• Supergiants
• Main Sequence
• Giants

Multiple Choice

After the main sequence, a high mass star becomes a

• black dwarf
• protostar
• red giant
• supergiant

Multiple Choice

What color of star is the hottest?

• Blue
• Red
• Yellow
• Orange

Multiple Choice

The color of the star tells us its 

• composition
• Temperature
• Luminosity 
• Mass

Multiple Choice

What determines if a star becomes a giant or a supergiant?

• star mass

• star temperature

• star color

• star luminosity

Multiple Choice

A star is officially "born" when it

• can do nuclear fusion

• glows

• is round

• has gravity