30.1 Characteristics of Stars Characteristics of Stars Section 30.1 Stars · star = ball of gas that emits light · fueled by nuclear fusion · vary in color Analyzing Starlight · spectrographs - device that separates light into different wavelengths (colors) · each star produces a unique spectrum (series of colors and lines) · a star's spectrum tells us elements present (composition) surface temperature how fast the star is moving toward or away from Earth Solar spectrum Star Characteristics · composition most common element - hydrogen second most common - helium · temperature blue = hottest yellow (ex. sun) red = coolest · size and mass dwarf, medium, and giant 1 How do scientists determine the composition and temperature of stars? A by taking samples from the star's surface B by analyzing the vibrations that the star emits C through magnetic testing D by analyzing the spectra of the light that a star emits 2 What color are the warmest stars? A yellow B blue C white D red
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Characteristics of Stars Stars - Oak Park Independent · Star Characteristics ·composition most common element - hydrogen second most common - helium ·temperature blue = hottest
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30.1 Characteristics of Stars
Characteristics of StarsSection 30.1
Stars· star = ball of gas that emits light· fueled by nuclear fusion· vary in color
Analyzing Starlight· spectrographs - device that separates light into different wavelengths (colors)· each star produces a unique spectrum (series of colors and lines)· a star's spectrum tells us
elements present (composition)surface temperaturehow fast the star is moving toward or away from Earth
Solar spectrum
Star Characteristics· composition
most common element - hydrogensecond most common - helium