Problem

To determine whether the size of the container will effect the growth of a crystal garden.

 Hypothesis

The crystal garden will be bigger in the biggest dish.

  Materials Watch Video

Things we need to make a CRYSTAL GARDEN

Charcoal briquettes (6)

15 ml ammonia (x 2)

90 ml salt (x2)

90 ml boiling water

90 ml laundry bluing

food colouring

shallow glass bowl ( x 2 )

mixing bowl

measuring spoons

mixing spoon

 Procedure  Watch Video

1. Place the charcoal briquettes into shallow bowl.
2. In the mixing bowl, combine ammonia, salt, water, and laundry bluing ; mix well.
3. Add several drops of food colouring to the mixture.
4. Pour the mixture over the briquettes.
5. Place your bowl in a place where it will not be disturbed, and where it will be easy for you to make daily observations. Write your observations on your Observations Sheet.

 Observations: Watch Video

Click to observe

 Conclusion

The crystal garden grows the biggest in the smallest bowl. This experiment shows a chemical change.

© Sargent Park School 2004  Last updated January 29, 2004