A scientist wanted to know how different conditions affect the rate of transpiration in plants. To conduct her investigation, the scientist poured 70 mL of water into four cups. In each cup she placed a plant. Then she placed each cup in a different condition: next to a fan, under a light, next to a misting fan, and one just in the middle of the room. Her data is in the table below.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e