Ch 29: Stars Review

What is the outermost layer of the Sun's atmosphere where solar wind originates?

• Photosphere

• Chromosphere

• Corona

• Aurora

What is the process of combining lightweight atomic nuclei to form heavier nuclei?

• Fusion

• Fission

• Combustion

• Evaporation

Which type of spectrum shows bright lines at certain wavelengths?

• Continuous

• Emission

• Absorption

• Reflection

What is the composition of the Sun?

• 73% Hydrogen, 25% Helium, 2% other

• 50% Hydrogen, 50% Helium

• 100% Hydrogen

• 100% Helium

What are constellations?

• Groups of the brightest stars named after animals

• Groups of stars that are densely packed

• Groups of stars that can only be seen at certain times of the year

• Groups of stars that appear to rotate around the poles

What is the name for a group of stars that are NOT densely packed?

• Open cluster

• Globular cluster

• Binary stars

• Circumpolar constellation

How is the speed and direction of a star's motion determined?

• Doppler shift

• Parallax

• Fusion reaction

• Hydrostatic equilibrium

What is the unit of measurement for the distance light travels in one year?

• Light-year

• Parsec

• Astronomical unit

• Kilometer

What determines the nuclear reaction rate and luminosity of a star?

• Mass

• Brightness

• Temperature

• Diameter

Which type of star is the most common on the H-R diagram?

• Red giants

• White dwarfs

• Main sequence

• Supergiants