Revision Topic: o level revision notes

Combined Science Form 4

O Level Revision : Combined Science - Plant Nutrition

The sun is the ultimate source of energy for all living things. Green plants can...

Combined Science Form 4

O Level Revision : Combined Science - Science in Structures...

A device that makes work easier by reducing effort required increasing distance,...

Combined Science Form 4

O Level Revision : Combined Science - Science in Industry...

Industrial processes involve production on a large scale. Large sites and machinery...

Combined Science Form 4

O Level Revision : O Level Revision : Combined Science...

The human race is always trying to find ways of making work easier. Machines are...

Combined Science Form 4

O Level Revision : Combined Science - Science in Industry...

Iron and copper are widely used metals.  Iron and copper exist in the environment...

Combined Science Form 4

O Level Revision : Combined Science - Science in Industry...

Materials in all forms, i.e. solids, liquids and gases are all made up of matter....

Combined Science Form 4

O Level Revision : Combined Science - Science in Structures...

Human life is enhanced by structures. Every structure has a design that makes it...

Combined Science Form 4

O Level Revision : Combined Science - Ecosystems

An ecosystem is a self-contained system of interdependent organisms and their physical...

Combined Science Form 4

O Level Revision : Combined Science - Science in Structures...

Human life is enhanced by structures. Every structure has a design that makes it...

Combined Science Form 4

O Level Revision : Combined Science - Inheritance

Plants of the same species are different. The difference between organisms of the...

Combined Science Form 4

O Level Revision : Combined Science - Reproduction in Plants

Reproduction is the production of young ones/offpring. Reproduction using sex cells...

Combined Science Form 4

O Level Revision : Combined Science - Transport in Animals

Many substances need to be transported around the body. Nutrients are transported...

Combined Science Form 4

O Level Revision : Combined Science - Transport in Plants

Plants are either dicotyledonous or monocotyledonous.  Seeds of dicotyledons have...

Combined Science Form 4

O Level Revision : Combined Science - Science in Energy...

Solar energy refers to energy from sun. Solar energy has three main components;...

Combined Science Form 4

O Level Revision : Combined Science - Gaseous Exchange...

Processes that take place in the body require energy. The energy needed by the body...

Combined Science Form 4

O Level Revision : Combined Science - Science in Energy...

There are negative and positive charges. Like charges repel while opposite charges...