Argue How Plants Grow Practice Test

A student tries to support the claim “Plants get most materials from soil.” Evidence available: tree mass increases while soil mass barely decreases; plants are 93% C, H, O; hydroponics plants grow well without soil; without CO$_2$, plants do not grow. Which statement represents the strongest argument based on the evidence?

Students observe: a plant gains 200 g of mass while the soil loses only 2 g. They also learn plants are 93% C, H, O from air and water and can grow in hydroponics. Which argument is best supported by the evidence?