Question

which observation most likely indicates that only a chemical change has taken place?

a.) states of matter changes
b.) the shape changes
c.) the reaction occurs
d.) The change cannot be reversed

Answer 1

c.) the reaction occurs

Answer 2

Why is it a physical change to freeze water?

a. Only a phase change occurs
b. A temperature change occurs
c. He is released during the process
d. The new and original substances are different

Answer 3

a. Only a phase change occurs

Answer 4

Which option is an example of a chemical change?

a. Chopping vegetables
b. Stretching a rubber band
c. Folding paper
d. Burning wood

Answer 5

d. Burning wood