Question

What do these two changes have in common?

carving a piece of wood
melting wax

Select all that apply.
a. Both are caused by heating.
b. Both are only physical changes.
c. Both conserve mass.
d. Both are chemical changes.

Answer 1

Both carving a piece of wood and melting wax are caused by heating and are physical changes, but they do not conserve mass nor are they chemical changes.

Step-by-step explanation:

Both changes have the following in common:

1. Both are caused by heating. When a piece of wood is carved, heat is typically applied to make the wood easier to work with. Similarly, when wax is melted, it is heated to change its state from solid to liquid.
2. Both are physical changes. Carving a piece of wood and melting wax both involve altering the appearance or state of the substance without changing its molecular structure.

Neither of these changes conserve mass nor are they chemical changes.