what are examples of chemical and phycal change?

Question

2 pictures 2answers 2 examples

Answer 1

Chemical change: (1) Reaction of feldspar with carbonic acid producing clay. This is a typical weathering reaction. (2) Weathering of olivine to form serpentine

Physical change: (1) Freeze-thaw cycles are examples for mechanical erosion. (2) Dissolution of halite in water.

Answer 2

they're examples of a chemical replace, with the aid of fact once you burn a candle the wick would not stay a wick that's going to become ash/smoke. For the rust, it was once steel, yet with the chemical replace its now rusted. you notice, they at the instant are not actual ameliorations, they're chemical, with the aid of fact they grow to be new aspects.

Answer 3

Physical change-freezing of water, evaporation of rubbing alcohol

Chemical change-burning wood, rusting nail

A physical change is reversible, a chemical change is not.

For pictures go:
http://www.learner.org/channel/courses/essential/physicalsci/session4/closer1.html

Answer 4

physical changes-vaporization of water,and heating hydrated copper(II) sulphate.
chemical changes- burning of wood and burning magnesium in air to form magnesium oxide