It’s time to make the ice pieces. For ice piece 1, place 2 teaspoons of water into one of the spaces in the ice cube tray. To make ice piece 2, place 2 teaspoons of water into the sealable plastic bag. Carefully squeeze as much of the air out of the bag as possible without spilling any water. Then seal the bag. Place the sealed bag on a flat surface in the freezer. Place the ice cube tray in the freezer at the same time. Leave both in the freezer for four hours. Record the start time and the time when you can remove the ice.

answer: c.

explanation:

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

the temperature of the gas, in k, not celsius.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms