Burning a paper does not change its mass.

Materials:

* A piece of paper

* A scale

* A lighter or matches

* A fireproof container

Procedure:

1. Weigh the piece of paper on the scale.

2. Place the piece of paper in the fireproof container.

3. Light the paper on fire.

4. Allow the paper to burn completely.

5. Weigh the ashes of the paper on the scale.

Expected Results:

The weight of the ashes of the paper will be the same as the weight of the paper before it was burned.

Conclusion:

The results of this experiment support the hypothesis that burning a paper does not change its mass. This is because the mass of the ashes of the paper is the same as the mass of the paper before it was burned. This means that the chemical reactions that occur during burning do not change the total amount of matter in the paper.