Which of the following is an example of a chemical change? a mixture of flour, sugar, eggs, and butter is baked to become a cake. flour and sugar are sifted together into a measuring cup. chocolate squares are melted to make cake icing. the shell of an egg breaks when it is struck against a hard surface.

The reversalists continue their labors, confident that they will one day construct an engine that generates more compression than it uses, a perpetual power source that will restore to the universe its lost vigor. which theme is best supported by the excerpt? a. scientific study requires dedication and perseverance. b. people will always look for a way to achieve immortality. c. death must always be endured alone. d. change is difficult to accept but beneficial if embraced.