Question

Chemical energy is stored in our food. What form of energy did this chemical energy start out as?

chemical energy from the plants it came from


kinetic energy from moving from a plate to your mouth


light energy from the sun


heat energy from being cooked on the stove

Answer 1

The answer is: light energy from the sun.

Light energy is radiant energy from the sun; it's the only kind of energy we can see with our eyes.

In photosynthesis (convert light energy into chemical energy), the carbon in carbon(IV) oxide is being reduced to form glucose.

The pigment chlorophyll absorbs one photon and loses one electron (it passed throw an electron transport chain) in the light-dependent reactions.

Light energy is transformed into chemical energy, that is stored in carbohydrate molecules (glucose), which are synthesized from carbon dioxide and water.

Answer 2

Answer: Option (c) is the correct answer.

Step-by-step explanation:

Plants used to prepare food in the presence of sunlight. Therefore, plants uses solar energy to make food.

Due to solar energy various chemical reactions take place in the food.

Thus, we can conclude that chemical energy is stored in our food and this chemical energy start out as light energy from the sun.