The theory says that the big bang produced the chemical elements hydrogen and helium. what evidence supports this? you find an abundance of both hydrogen and helium in all matter.

a. you find an abundance of both hydrogen and helium in all matter.

b. the composition of stars is mostly hydrogen.

c. astronomers found primordial gases with the expected ratio of helium to hydrogen.

d. primordial hydrogen gas was found and there is an abundance of both of these elements.

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water