Complete the sentence.
In this chemical reaction, glucose is a ().
A: reactant
B: product
Read the underlined text carefully. Look for information about what happens to glucose in this chemical reaction.
Plants make glucose, a sugar they can use for food, through a process called photosynthesis. During photosynthesis, plants use energy from sunlight to make glucose from water and carbon dioxide. In the process of making glucose, plants also create most of the oxygen in the air we breathe.
The underlined text tells you that glucose forms when water combines with carbon dioxide. Because glucose is produced by this chemical reaction, glucose is a product.