Grade 7: Science
Online lessons to help you learn.
Take online learning one step at a time with our digital content and interactive simulations. To launch a lesson click on the green folder symbol. To launch a simulation click on the green hand symbol.
1. Conserving energy
Non-renewable energy sources are limited so it is important that we conserve energy.
2. The Earth and beyond
The moon’s apparent shape changes in a predictable way. These changes may be explained by the moon’s motion relative to the earth and sun.
3. What is energy?
Explain what energy is and give examples of how energy makes things happen.
4. Wiring a plug
How to wire a three pronged plug.
5. Direct sources of water pollution
Water is essential for life and therefore it is very important that we keep water clean and free from pollution.
6. Electricity rules for outside
Safety rules for electricity.
7. Electricity rules for the home
Safety rules for electricity in the home.
8. Indirect sources of water pollution
Water is essential for life and therefore it is very important that we keep water clean and free from pollution. Polluted water carries disease, toxic wastes and other harmful substances that can kill plants and animals. There are two sources of water pollution, namely direct and indirect sources.
9. Your senses - the skin
Sense organs are specially developed parts of the body that receive information and take it back to the brain. The sense organs are the eyes, ears, nose, tongue and skin. The structure of the skin is covered in this lesson.
10. Circuit Diagrams
Learn how to draw simple circuits and the symbols used to represent them.
11. Fuses and Circuit Breakers
Understand how a fuse protects a circuit and learn some uses of resettable circuit breakers.
12. White blood Cells
Learn how the white blood cells defend the body against disease.
13. Vaccines
Learn that immunisations and medicines can be used to help the body fight infections.
14. Seasonal Changes in Population Size
Understand how some organisms are adapted to survive seasonal changes in their habitats.
15. Micro-Organisms
Learn the different types of microbes that can cause disease.