Outer Space: Classifying Stars

The continuous spectrum of a star has gaps in it, darker bands where different elements ___

• absorb different colors
• reflect different colors
• transmit different colors
• refract different colors

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-3

The classification scheme used today arranges stars by ___

• their size, assigning each a number
• their size, assigning each a letter
• their temperature, assigning each a number
• their temperature, assigning each a letter

The letters 'O', 'B', 'A', 'F', 'G', 'K' and 'M' arrange stars in order from ___

• hottest to coolest
• coolest to hottest
• largest to smallest
• smallest to largest

The total amount of energy emitted by a star is called its ___

• incandescence
• luminosity
• spectral integrity
• apparent brightness

Tags

NGSS.HS-ESS1-1

The luminosity of a star depends on ___

• its size and temperature
• its age and density
• its size and distance from us
• its age and distance from us

The thick line, running diagonally down an HR diagram is called ___

• the general trend
• the main sequence
• the main trend
• the general sequence

Comparatively, as shown on an HR diagram, massive stars are ___

• hotter and more luminous
• cooler and more luminous
• hotter and less luminous
• cooler and less luminous

Tags

NGSS.HS-ESS1-1

The stars on the lower left of an HR diagram are hot, blue/white but very faint, and are called ___

• white giants
• blue giants
• white dwarfs
• blue dwarfs

Tags

NGSS.HS-ESS1-3

Most stars live the majority of their lives ___

• as white dwarfs
• along the main sequence
• as red giants
• as red super giants

Tags

NGSS.HS-ESS1-3

At 10,000 degrees Celsius, hydrogen begins to change into helium and energy is released in a process called

• supernova
• pulsar
• nuclear fusion
• nuclear fission

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8