What happens when we place metals into acid?

Science

Adding a metal to acid is an example of a physical change.

A different person repeats the experiment and gets different results.

A different person repeats the experiment and gets the same results.

The same person repeats the experiment and gets different results.

The same person repeats the experiment and gets the same results.

The thing that is changed in an investigation.

The thing that is measured in an investigation.

The things that are kept the same in an investigation.

Bubbles forming is an example of an observation we might make of a chemical reaction.