Question

What do these two changes have in common?

ice crystals forming on a window
beating an egg
Select all that apply.
Both are chemical changes.
Both conserve mass.
Both are changes of state.
Both are caused by heating.

Answer 1

Ice crystals forming on a window and beating an egg have changes of state in common.

Step-by-step explanation:

Both ice crystals forming on a window and beating an egg involve changes of state. When water vapor in the air comes into contact with a cold window, it loses heat to the window, causing it to condense and form ice crystals. Similarly, when an egg is beaten, the proteins in the egg white are denatured by the mechanical force and undergo a change from a liquid to a foam-like state.

However, the two changes differ in other aspects. The ice crystals forming on a window is a physical change as it does not involve a chemical reaction. On the other hand, beating an egg is a mechanical change as it involves the application of mechanical force to alter the physical properties of the egg.

The three keywords for this answer are: changes of state, condense, denatured

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