How Baking Soda Reacts With Vinegar How Rust Can Be Scraped off of Metal How Metals Respond to Electrical Currents How Elements Can Change Phase When Heated
I gave my students this multiple choice question: A teacher asks her students to examine titles of four scientific articles. Which titled article is specifically about a chemical change?

Only one answer is correct among these 4 choices:
- How Baking Soda Reacts With Vinegar
- How Rust Can Be Scraped off of Metal
- How Metals Respond to Electrical Currents
- How Elements Can Change Phase When Heated

Could you tell me which one is correct?

How Baking Soda Reacts With Vinegar