• An endothermic reaction is a chemical reaction in which more energy is needed to break bonds in the reactants than is released when new bonds form in the products.
  • In photosynthesis, plants make the simple sugar glucose (C6H12O6) from carbon dioxide (CO2) and water (H2O).
  • They also release oxygen (O2) in the process.
  • The energy needed for photosynthesis comes from light.
  • Without light energy, photosynthesis cannot occur.
  • The drop in temperature may be great enough to cause liquids to freeze.
Select from the frequently asked questions below