Weegy: Main sequence star has the coolest surface temperatures. User: When the Sun depletes its current core fuel, it will become a _____. A. red giant B. white dwarf C. neutron star D. main sequence star Weegy: When the Sun depletes its current core fuel, it will become a white dwarf. User: If a white dwarf or neutron star were to gain mass, it would _____. A. grow larger B. become smaller C. remain the same size (More)

Weegy: Tightly packed electrons prevents a white dwarf star from completely collapsing upon itself. (More)

Weegy: Blue stars that are hottest in terms of surface temperature fall into spectral class: O. (More)

Weegy: Dollar is the currency of the U.S. (More)

Weegy: Appalachian Mountains chains is the oldest. User: The Appalachian Mountains run through which of the following U.S. regions below? A. midwestern U.S. B. interior western U.S. C. southern U.S. D. the Pacific states (More)