Which statements describe properties of stars? check all that apply
stars produce energy through nuclear fusion.
stars produce energy through gravity.
stars are massive objects composed of gas.
stars are solid objects that we could stand on.
stars are composed primarily of hydrogen and helium.
stars are composed primarily of liquids such as water.

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

What are four significant sources of ghgs that come from wostem washington?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided