Photosynthesis Inputs Outputs Practice Test

Scenario (Error detection): Photosynthesis involves inputs and outputs of matter. A student says, “I can tell inputs and outputs just by memorizing the words, not by the arrows.”

Model description: Into leaf arrows labeled “carbon dioxide (matter)” and “water (matter)”. Out of leaf arrows labeled “oxygen (matter)” and “sugar/food (matter stored)”. Into leaf arrow labeled “sunlight (energy)”.

What evidence in the model best identifies an output of matter?

Scenario (Error detection): Photosynthesis involves inputs and outputs of matter. A student draws a model with arrows and labels.

Student’s model description: Arrow into leaf labeled “oxygen (matter)”. Arrow into leaf labeled “water (matter)”. Arrow out of leaf labeled “carbon dioxide (matter)”. Arrow out of leaf labeled “sugar/food (matter)”. Separate arrow into leaf labeled “sunlight (energy)”.

Which part of the student’s model is an error when identifying inputs and outputs of matter for photosynthesis?