Question

after mixing two substances together, a cloudy layer forms and powder begins to form on the bottom of the class. what type of change is this? physical change chemical change multiple choice 1 point you cut a banana into slices. what type of change is this? physical change chemical change multiple choice 1 point you light a firework (sparkler) for the 4th of july. what type of change is this? physical change chemical change

Explanation:

1. When two substances mix and a cloudy layer forms with powder at the bottom, a new substance is likely created through a chemical reaction, so it's a chemical change.
2. Cutting a banana into slices only changes its physical appearance and shape, without altering its chemical composition, so it's a physical change.
3. Lighting a firework involves a combustion reaction that produces heat, light, and new substances, so it's a chemical change.

Answer:

1. Chemical change
2. Physical change
3. Chemical change