This is a type of force that occurs between two objects that are in contact.
These are simple machines that makes work easier.
They have Load, Effort and Fulcrum.
Load:- This is the work to be done
Effort:- This is the part which is held in the tool.
Fulcrum:- This is the turning point of the tool or of the tool and the part which is held.
Here the fulcrum is in between the load and the effort as in.
Here the load is in betwee the fulcrum and effort
Here the effort is in between the load and the fulcrum
Matter is anything that occupies space and has mass.
A solute-This is the solid which dissolves in a liquid.
A solvent-Thus is the liquid in which the solid dissolves in.
A solution-This is what is formed when solute and solvent are mixed completely.
Soluble solids:-This are solids that dissolves completely in liquids.
Insoluble solids:-These are solids that do not dissolve in liquids when they are mixed.
Miscible liquids:-This are liquids that mix to form a uniform solution eg water and milk,water and spirit, cooking oil and paraffin etc.
Immiscible liquids:-This are liquids that when put together and shaken still forms layers eg water and paraffin.
Evaporation:-This is a method that is used to separate a mixture of soluble solid from a liquid but only the solidis recovered.
Home made water filter
This is a form of energy.
There are two forms of electricity. ie Static and current electricity.
Static electricity is produced by rubbing two surfaces against each other.
Current electricity is produced from:
Good Conductors - These are materials that allow electricity to pass through them.
Bad conductors -These are materials that do not allow electricity to pass through them.
Lightning is a strong form of static electricity that is caused by the charges brought about by clouds .
Lightning arrestors are always fitted on tall buildings so that it when lighting strikes,the charges reach the ground
This is the ability of the soil to produce high yields for a long time.
Fertilizer: These are organic or inorganic substances that are added to soil that have lost their fertility.
They are grouped into natural fertilizers and artificial fertilizers.
Green Manure:They are made from green plants,these plants should be:
Farmyard manure: They are made from animals wastes such as urine,dung, poultry droppings and animal bedding.
Compost manure: This is a mixture of decayed plants,animal waste,leaves and vegetable peelings
How to encourage fast decomposition of compost heap:
Mulches: These are plant materials such as plant leaves and dry grass which are used as soil cover.
They are classified into two:
They contain only one macronutrient.
Examples of nitrogenous fertilizer.
Examples of Phosphatic fertilizers.
Examples of potassic fertilizers.
They provide two or more of the macronutrients to a plant.
Examples of compound fertilizers.
Activity 2: State other advantages and disadvantages of using manures.and fertilizers
This involves making water impure or contaminating it.
Conservation means proper care and use of water sources.
It ensures water isused sparingly and conserved for future use.
This is the dependence of one person on another;or one living thing upon another.
Plants depends on animals in the following ways:
Animals depends on plants in the following ways:
Plants depends on other plants for the following ways:
Animals depends on other animals in the following ways:
Examples of Insectivorous plants
A food chain is a relationship in which living things depends a feed on one another directly.
Examples of a food chain:
A pest is a troublesome or harmful thing,animal or insect.
They damage crops
Pests are classified into two ie
|Pest||Crop attacked||Type of damage caused|
|Stalk borer||maize,sorghum,sugar cane||
|Birds e.g weaver bird||maize,rice,millet,sorghum.||
Environment is what surrounds an organism
Drug is any substances other than food that, alters the functioning of the body.
Drug misuse -This is the usage of any drug for any other purpose other than the recommended one.
Drug abuse -This is using of drug to a way that the body cannot work without it.
|Health effects||Social effects|
A myth is a false idea or a false story that many people believe is true.
A conception is a wrong or untrue idea which people believe because they do not have the facts or do not understand it at all.
Activity: Draw a well labelled diagram of the heart.