(earth science not chem!!) What branch of Earth Science deals with stars and galaxies beyond Earth?

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange