The teacher will be supplied with a guide / information to do the experiments for each of the 55 themes. The experiment can first be demonstrated in the class and afterwards every learner must be involved in doing the experiment. Experiments can be done individually or in a group.
Example: Grade 6 Term 3 Electrical circuits (Teacher’s guide)
The most important parts of the electric circuit:
Conductors – Electric wire
Cell – Battery
Resistance – lamp
Make a Battery from Potato
Batteries generate electricity through a chemical reaction between two different electrodes and one electrolyte. Use of Copper and Zinc electrodes and Sulphuric acid as electrolyte is a proven method for this process. We do not want to use Sulphuric acid because it is a strong acid and we do not want to use it near Primary School children.
Problem – We are wondering if we can use any other liquid as an electrolyte. Can a potato / lemon be used to generate electricity?
Hypothesis – Potato / lemon juice contains many water soluble chemicals that may cause a chemical reaction with one or both of our electrodes. So we may get some electricity from that.
Material – For this experiment we use:
• A fresh potato / lemon and other fruit
• A piece of Copper as an electrode
• A piece of Magnesium as an electrode
• Crocodile clip leads
• Light bulb or LED
Procedure – We insert copper and magnesium electrodes in to the potato, close but not touching each other. We use Crocodile Clip leads to connect our electrodes to the Light bulb or LED. After a few experiments we saw that we need more electricity to power our LED. Therefore we used more potatoes or lemons to give enough electricity to power the LED.
By connecting multiple potato batteries you can make enough electricity to light-up a super bright light emitting diode.
- Lectures 19
- Quizzes 0
- Duration 50 hours
- Skill level All levels
- Language English
- Students 0
- Assessments Yes
- Nutrients in Food
- Ecosystems and Food Webs
- Solids, liquids and gasses
- Solutions as special mixtures
- Mixtures & Water Resources
- Processes to Purity Water
- Electric Circuits
- Electric Conductors & insulators
- Systems to solve problems
- Mains Electricity
- The Solar System
- Movements of the Earth & Planets
- The Movement of the Moon
- Systems for looking into space
- Systems to explore the moon and mars