Bobby claimed that because bubbles are formed when boiling water it must be a chemical change. He argued that a gas is being created, which is a sign of a chemical change. Evan disagreed, saying that that it did not change into a different substance and was thus a physical change. Who do you agree with? Explain your reasoning

I disagree with Evan's explanation for chemical change with regards to formation of bubbles.

Explanation:

Chemical change usually affects the chemical composition, whereas physical change only affects the appearance of the substance and is easily reversible.

The bubbling water is just going through change of phase, but its overall chemical composition isn't altered, Hence, it is a physical change, and not chemical.

I hope this was easy to understand.

i believe that it is a exoplanet

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?