Complete the sentence.
In this chemical reaction, zinc is a ().
reactant product
This passage describes a chemical reaction. Read the passage. Then, follow the instructions below.
Many watches are powered by small, flat batteries called button cells. One common type of button cell contains the metal zinc. When zinc in the battery combines with oxygen in the air, zinc oxide forms. This process generates the electricity that powers the watch.
A chemical change occurs when new substances are formed from existing substances. This process is called a chemical reaction.
In a chemical reaction, one or more substances change into one or more different substances. During the reaction, the atoms of the original substances are rearranged to form other substances.
The original substances in a chemical reaction are called reactants. These substances react, or go through a chemical change.
The substances that are formed in a chemical reaction are called products. These substances are produced by the chemical reaction.
So, in a chemical reaction, reactants go through a chemical change to form products.
Read the underlined text carefully. Look for information about what happens to zinc in this chemical reaction.
Many watches are powered by small, flat batteries called button cells. One common type of button cell contains the metal zinc. When zinc in the battery combines with oxygen in the air, zinc oxide forms. This process generates the electricity that powers the watch.
The underlined text tells you that when zinc and oxygen combine, zinc oxide is formed. When zinc and oxygen react, or go through a chemical change, their atoms are rearranged to form zinc oxide. Because zinc reacts in this chemical reaction, zinc is a reactant.