Which gas is not produced by volcanic eruptions? A. Sulfur dioxide
O B. Carbon dioxide
C. Water vapor
D. Oxygen

In salt water solution,the salt is the blank

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.