Science ! 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.

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 :)

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).