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SCIENCE HELP!!!

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.

Respuesta :

ErnieIrwin
1.) Charring a Marshmallow

2.) I think its B 

Hello, The answer for number 1 will be D) Charring of a Marshmallow, because you are burning the marshmallow, when you mix the fire with the Marshmallow you will get the final product, making it a chemical change.

The answer for number 2 is B) The changed substance retains its unique properties. Because when a physical change takes place, only it's form will change, making it's particles, and properties the same.


Hope it helps :)