How would the amount of carbon dioxide change if there were no plants?

What is the most common form of matter in the universe

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.

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved