1. Energy is needed by living things and non-living things.
2. Various sources of energy include the sun, food, wind, fuel and battery.
3.The Sun is the main source of energy.
4.Various forms of energy include potential energy, kinetic energy, electrical energy, light energy, chemical energy, heat energy and solar energy.
5. energy can be transformed from one form into another.
6. Renewable energy is the energy that can be replenished when used up.
7.Non-renewable energy is the energy that cannot be replenished when used up.
8. We need to use energy wisely because some energy resources cannot be replenished when used up.
9. Renewable energy is better than non-renewable energy.


1. Microorganisms are tiny living things.
2. Most of them can only be seen with the help of a hand lens or under a microscope.
3. Bacteria, virus, fungi, protozoa and algae are examples of types of microorganisms.
4. Microorganisms undergo life processes just like other living things.
5. Some microorganisms are useful and some are harmful.
6. Contagious diseases can spread from one person to another.
7. Diseases can be prevented from spreading by taking precautions.


1. Matter can exist in the forms of solid, liquid or gas.
2. A solid has mass, fixed volume and fixed shape.
3. A liquid has mass,fixed volume and no fixed shape but takes the shape of its container.
4. A gas has mass, no fixed shape, occupies, has no fixed volume and can be compressed.
5. Water can exist in all three states of matter.
6. Water changes from one state into another through melting, freezing, boiling, condensation and evaporation.
7. water cycle is a continuous movement of water from the Earth's surface into the air and back to the Earth's surface again.
8. It is our responsibility to keep our water resources clean.

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