Question

1. Which of the following represents a chemical change?

Mowing of grass
Sublimation of ice
Dissolving sugar in water
Charring of a marshmallow

2. If a physical change has taken place, which of these is most likely true?

A permanent change has taken place.
The changed substance retains its unique properties.
Atoms rearrange to form a new substance.
The molecular composition of a substance changes.

Answer 1

@563blackghost @dude @Elsa213 @ThisGirlPretty @Yinshy @AngeI

Answer 2

What do you think? Look up the definitions of chemical and physical change.