Question

chemical changes result in a new substance, but keep in mind that no new atoms are created. existing atoms rearrange as chemical bonds break and new bonds form. thats what creates the new substance. for instance, rust on your bike can form after it rains. it forms from atoms in the rainwater, the steel of your bike and oxygen in the air. no new atoms are created that werent present before the change.
in the passage above, what is the purpose of the underlined sentence?
choose one option
a to give an example of how steel can physically change
b to support the statement that no new atoms are created in a chemical change
c to support the statement that rain can damage many materials
d to give an example of how the weather can affect a persons belongings

Explanation:

The passage first states that in chemical changes no new atoms are created. Then it gives the example of rust (a chemical change) forming from existing atoms (in rainwater, bike steel, and air oxygen). This example directly supports the initial statement about no new atoms in chemical changes.

Answer:

B. to support the statement that no new atoms are created in a chemical change