Question

rita wants to make some toast for breakfast. she puts a slice of bread in the toaster. after 10 minutes, rita notices that the sides of the bread are black. what caused this chemical change to take place? added mass added warmth added volume added particles

Explanation:

When bread is put in a toaster, heat is applied. The added warmth causes a chemical change in the bread, leading to browning and in this case, burning (black - ening). Heat energy initiates chemical reactions like the Maillard reaction which changes the color, flavor, and texture of the bread.

Answer:

B. added warmth