Question

Hypothesis: If a material undergoes a chemical change, then it will not retain its original properties because a new substance is formed.

To test the hypothesis above, you will observe the changes during the experiment.

To do this, you will use these observations to compare the
of the substances
to the
of the substances.

Answer 1

To do this, you will use these observations to compare the properties of the substances before the change to the properties of the substances after the change.

(For example: color, odor, temperature change, gas production, precipitate formation, and physical state.)