Pure gold (24 kt) is a soft metal, so jewelers often add other metals (silver or copper) to make gold rings harder (and less expensive). when the metals are combined a chemical reaction does not occur. are these rings mixtures or compounds? explain your answer

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Compare and contrast physical changes with chemical changes.

Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.