Approximately, what basic composition are all stars born with? a) 98 percent hydrogen, 2 percent helium b) half hydrogen, half helium, no more than 2 percent heavier elements c) three-quarters hydrogen, one-quarter helium, no more than 2 percent heavier elements d) 90 percent hydrogen, 10 percent helium, no more than 1 percent heavier elements e) one-quarter hydrogen, three-quarters helium, no more than 2 percent heavier elements

The rocky mountain system stretching from canada to new mexico is a string of mountains running along the wester united states. what factors would mostly cause this arrangement of mountains? intense pressure undemeath a tectonie plate that could not breakthrough the rock subduction of a tectonic plate, which pushed up a neighboring plate into mountains two plates located at a diverging boundary with a third plate rising between them two plates that melted into molten rock, which later cooled into the shape of mountains

What is the mercury length of time for one revolution around the sun?

Nwhat way does renewable energy differ from nonrenewable energy?