The best graphic organizer to compare the energy inputs and outputs of cellular respiration and photosynthesis is a Venn diagram.

Quick Scoop

To directly answer the question:

  • A Venn diagram lets you clearly show what is unique to each process (in separate circles) and what they share (in the overlap).

You could set it up like this:

  • Left circle: Photosynthesis
    • Inputs: carbon dioxide, water, light energy.
* Outputs: glucose, oxygen.
  • Right circle: Cellular respiration
    • Inputs: glucose, oxygen.
* Outputs: carbon dioxide, water, ATP (usable energy).
  • Overlapping middle:
    • Both involve transformation of energy and share some of the same molecules (e.g., water, carbon dioxide, oxygen, glucose in opposite roles).

A Venn diagram is preferred over a simple list or flowchart here because the question is specifically about comparing inputs and outputs—similarities and differences—something Venn diagrams are designed to highlight visually.

TL;DR: Use a Venn diagram to best compare the energy inputs and outputs of cellular respiration and photosynthesis.

Information gathered from public forums or data available on the internet and portrayed here.