what do these two changes have in common? boiling an egg ice crystals forming on a window select all that…

what do these two changes have in common? boiling an egg ice crystals forming on a window select all that apply. both conserve mass. both are only physical changes. both are caused by cooling. both are chemical changes.

what do these two changes have in common? boiling an egg ice crystals forming on a window select all that apply. both conserve mass. both are only physical changes. both are caused by cooling. both are chemical changes.

Answer

Brief Explanations:

Boiling an egg is a chemical change as the proteins in the egg denature. Ice - crystals forming on a window is a physical change (deposition). All chemical and physical changes conserve mass according to the law of conservation of mass. Boiling an egg is caused by heating, not cooling, and ice - crystals forming is caused by cooling.

Answer:

A. Both conserve mass.