Hey Mr. Wood, its Melanie from 6th period and I am going to try to answer the questions about carbon balence. 1.The graph is showing about 387.6 CO2 concentration (pm) 2.The data was collected either early in the morning or in the evening because the amount of carbon is very low where as in the mornings it would be high because of the amount of sunlight that hits the surface. 3.I think it would be higher because the sun would be out causing more CO2 to form. -Melanie P. 6