Question

4. in the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water, which of the following is a reactant?
A. sucrose
B. carbon dioxide
C. water
D. heat

5. which of the following is NOT a physical change?
A. grating cheese
B. melting cheese
C. fermenting of cheese
D. mixing two cheeses in a bowl

6. A chemical change occurs when a piece of wood_____.
A. is split
B. is painted
C. decays
D. is cut