Activity for the 1st cycle

This LES serves as a pretext to:

-the exploration of the conservation of matter (liquid quantities and volume)-the development of good work methods; -initiate the concept of solubility; -problem resolution (economic aspect of consumption).

Conservation of matter (liquids quantities and volume).

Mixtures

Material

A preparation guide has been supplied for all the activities. We tried to establish a materials list using every day items.

Mixtures – Theoretical capsule

-What is a mixture? (4 definitions)-What are the two types of mixtures?

Homogenous Heterogeneous

We can not distinguish the different

substances present at the start.

We can distinguish the different substances that have been mixed

(not always to the naked eye).

Mixtures – Theoretical capsule

-What is dissolution?-Difference between soluble and non soluble-Collective demonstration to « live » dissolution-Experiments by the students

Mixtures – Student observations

-On top, there is water, at the bottom, the sand.

-The water has changed colours. There are grains (pepper).

-The grains (Epsom salts) have disappeared.

Mixtures – Student observations

-The grains of sand stay at the bottom of the water and it’s transparent.

-I put the water in after some sand. I mixed it and the water was kind of mixed with dust and the sand had not disappeared.

-The water looks yellowish. The water level is higher. (brown sugar)

Mixtures - Demonstrations

Video 1 – 1 tablespoon of flavour crystals

Video 2 – 3 tablespoons of flavour crystals

Video 3 – 12 tablespoons of flavour crystals

MixturesObservation of demonstrations

MixturesStudents observations

It may be difficult to manage the activity alone. The teacher would redo the activity with a colleague.

Thanks to Maxime and Marie-Soleil from La Mennais school, CSDM.