Tell the learners that they will deal with different chemical substances at home and at school during their Natural Sciences periods.
Let them mention which cleaning products are on the market and the purpose of each one. Possible answers [Washing powder, soap, bleach, brasso, Handy Andy, dishwasher; shampoo, conditioner, polish, etc.].
Teacher Input 1
Establish what the learners know by asking the following questions:
How is the water in the swimming pools being kept clean?
What household liquid can we use to unblock drains?
Why do we squeeze lemon juice over bananas when we make fruit salad?
Tell them that they will be learning more about the tastes of different substances in the video and presentation that will follow.