Stars, Fusion, Spectroscopy, Electromagnetic Spectrum Review

Which observation most directly supports that the universe is expanding?

• Changing phases of Venus

• Parallax of nearby stars

• Redshift of distant galaxy spectra

• Seasonal constellations

Tags

NGSS.HS-ESS1-2

The Cosmic Microwave Background (CMB) is best described as:

• Radio noise from the Sun

• Leftover radiation from the hot early universe

• Light from star-forming nebulae

• X-rays from supernova remnants

Tags

NGSS.HS-ESS1-2

According to Hubble’s Law, galaxies that are farther away from Earth:

• Move toward us faster

• Move away faster

• Do not move at all

• Move randomly

Which instrument is used to measure redshift in galaxy light?

• Seismograph

• Spectrometer

• Barometer

• Calorimeter

Tags

NGSS.HS-ESS1-2

A blueshift in a star’s spectral lines indicates the star is:

• Rotating rapidly

• Moving away from Earth

• Approaching Earth

• Not emitting visible light

Tags

NGSS.HS-ESS1-2

Which combination of evidence supports the Big Bang Theory?

• Plate tectonics + tides

• Sunspots + auroras

• Redshift + CMB + Hubble’s Law

• Parallax + eclipses

Tags

NGSS.HS-ESS1-2

On the H–R diagram, main sequence stars show that as temperature increases, luminosity:

• Decreases

• Stays the same

• Increases

• Becomes unpredictable

A star’s color indicates its:

• Density

• Surface temperature

• Distance from Earth

• Rotation rate

Which statement about blue main sequence stars is accurate?

• They are cool and long-lived

• They are hot, very luminous, and short-lived

• They are cool and dim

• They always become white dwarfs

Red giants are typically:

• Hot and dim

• Cool but very luminous

• Hot and very dim

• The smallest stars