What season comes before spring

Rotenone is an insecticide that is toxic

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.