Question

One day you decide to help your dad make a campfire. You and your dad complete the following steps. Which of the following describes a chemical change happening?

Chopping the wood into small logs and placing them in the fire pit.
Tearing apart newspapers and placing them on top of the wooden logs.
Finally, your dad lights the newspaper and wood on fire using a match.
(A)Step II only
(B)Step III only
(C)Steps I and III
(D)Steps II and III

Answer 1

Answer:

b) step 3

Explanation:

cuz after burning they'll turn to ashes which is a chemical change

Answer 2

Answer:

(B) step lll only

Explanation:

(B) step lll only because in the first two steps only the physical apparence of the paper and wood take place but in the 3rd step when woood and newspaper is put on fire, reaction takes place and it converts into ashes. Its chemical composition changes along with physical substance. A new substance is formes plus this change is irreversible. thus this is a chrmical change.