The three colors of cellophane serves as the light source for the set-up. The three colors would give different wavelengths of light to the sample in the jar. It is the independent variable in this experiment. Hope this answers the question.
1- greenhouse gasses cause the greenhouse effect and make the planet warmer throughout the entire world. 2- A 3- A 4- taken in 5- (need the answer choices) 6-? 7- the carbon cycle is important because it circulates oxygen and CO2 throughout the atmosphere so that plants and animals can exist because of the other.
