Class 4 Science
In science Class 4 are learning about the properties of different materials. Today they made salt solutions until the water was saturated. As a class we evaporated the solution to separate the salt from the water proving this was a reversible change. They added yeast to water and bicarbonate of soda to vinegar and watched a gas being formed proving that these changes are irreversible. Their third challenge was to make an emulsion with water and oil. They used fairy liquid, egg yolk and gum Arabic and observed the how the oil and water behaved when each substance was added.