Question

1. students are given a sample of an unknown material. they want to perform tests to determine its identity. which test is most likely to change the sample into another material?- dissolving it in water- burning it producing a change in thermal energy- heating it until it melts- grinding it into a powderclear all

Explanation:

Physical changes (dissolving, melting, grinding) only alter the material's form, not its chemical identity. Burning is a chemical reaction that breaks down the original material and forms new substances (e.g., combustion of carbon produces $\text{CO}_2$), which changes the sample into another material.

Answer:

burning it producing a change in thermal energy