Which statement is true about our galaxy? it forms an ellipse. its shape is irregular. its arms spiral outward. it contains the universe.

Answer,

Its arms spiral outward

Hope This helps :-)

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%