Magnetism is a force that can attract (pull closer) or repel (push away) objects that have a magnetic material like iron inside them (magnetic objects). Magnets can be affected by electricity, which makes them very useful in machines and computers. Magnets are used to make a tight seal on the doors to refrigerators and freezers, […]
To stop a moving object, a force must act in the opposite direction to the direction of motion. For instance, if you push your book across your desk, the book will move. The force of the push moves the book. As the book slides across the desk, it slows down and stops moving. The force
In the school and at home, we see many moving things. We move about on our legs, vehicles move on roads, trains on the rails, aeroplanes fly in the sky and ships sail on the seas. Movement occurs when a force is applied on a thing or object. That is, force causes things to move.
An inclined plane is a simple machine. It allows one to use less force to move an object. Examples of inclined planes are ramps, sloping roads and hills, plows, chisels, hatchets, carpenter’s planes, and wedges. MEANING INCLINED PLANE An inclined plane is a simple machine used to raise a load to places higher than the
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A pulley is a wheel that has a smooth groove in its rim, with a rope passing through the groove. At times, there are loads that are too heavy to lift. MEANING OF PULLEY A pulley is a simple machine that is used to lift heavy objects. A simple machine for overcoming this difficulty is
A machine is a simple object which makes our work easier to do. Many objects in the school and at home such as a pair of scissors, bottle opener and cutlass, are examples of simple machines. In science, anything that makes us to use less energy to do much work or overcome a large force
MEANING OF SAFETY Safety means keeping yourself and others free from harm or danger. That’s being careful not to fall, bump or run into things. MEANING OF ACCIDENT Accidents are unplanned or unexpected events that happen to human beings. Accidents can happen everywhere, for example, in the schools, homes, roads and markets. COMMON ACCIDENTS
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WATER POLLUTION Water pollution is when waste, chemicals, or other particles cause a body of water (i.e. rivers, oceans, lakes) to become harmful to the fish and animals that need the water to survive. Water pollution can disrupt and negatively impact nature’s water cycle as well. Causes of Water Pollution Water pollution has various
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AIR POLLUTION Air pollution is when unwanted chemicals, gasses, and particles enter the air and the atmosphere causing harm to animals and damaging the natural cycles of the Earth. Various Causes of Air pollution The burning of fossil fuels Sulfur dioxide emitted from the combustion of fossil fuels like coal, petroleum and other factory combustibles
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Environmental Health is the branch of public health that focuses on the interrelationships between people and their environment, promotes human health and well-being, and fosters healthy and safe communities. EXAMPLES OF ENVIRONMENTAL HEALTH HAZARD Tobacco smoke. Radon. Asbestos. Lead. Combustion gases. Tap water Household chemicals. Pesticides See also High and long jump Classes
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Long jump (Field events) Long jump is a Feld event which involves running and then jumping for a distance from a spot into a fat surface called landing pit. The event requires speed, spring and a great deal of body control. The jump has the following five stages (skills): 1 The approach run or run-up
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A carb is a macronutrient—a sugar, starch or fiber found in grains, fruits, vegetables, and dairy products. They’re hard to avoid and they’re one of the most basic food groups humans need to stay alive. Sources of Carbohydrates Carbohydrates are found in a wide array of both healthy and unhealthy foods—bread, beans, milk, popcorn,
Nutrition is how food affects the health of the body. Food is essential—it provides vital nutrients for survival, and helps the body function and stay healthy. The process of taking in food and using it for growth, metabolism, and repair. CLASSES OF FOOD There are seven major classes of nutrients: Carbohydrates. Fats. Minerals. Proteins.
The skeleton is the body part that forms the supporting structure of an organism. It can also be seen as the bony frame work of the body which provides support, shape and protection to the soft tissues and delicate organs in animals FUNCTIONS OF THE SKELETAL SYSTEM Skeletal system has several additional functions, including:
The muscular system is made up of tissues that work with the skeletal system to control movement of the body. Some muscles—like the ones in your arms and legs—are voluntary, meaning that you decide when to move them. Other muscles, like the ones in your stomach, heart, intestines and other organs, are involuntary. Functions
The human digestive system is a series of organs that converts food into essential nutrients that are absorbed into the body. The digestive organs also move waste material out of the body. The enzymes in saliva help break down foods, and the lubrication function of saliva makes it easier for food to be swallowed.
System of the body and its functions Body systems are groups of organs and tissues that work together to perform important jobs for the body. Some organs may be part of more than one body system if they serve more than one function. Other organs and tissues serve a purpose in only one body system.
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Electricity is a form of energy that can give things the ability to move and work. Electricity makes the following to do work or move: bulbs, toys, machines, cars, television etc. CONDUCTOR AND NON CONDUCTOR CONDUCTOR Conductors are materials that allow energy to flow through them. For example, wire, iron, pin, spoon, etc. They
Electricity is a form of energy that can give things the ability to move and work. Electricity makes the following to do work or move: bulbs, toys, machines, cars, television etc. PUPILS ACTIVITIES Materials required A plastic comb (or a glass rod or a plastic rod), pupils with dry hair, a piece of dry
HEAT Heat is a form of energy that increases the level of hotness of the body. TEMPERATURE Temperature is the degree of hotness or coldness of the body –water, iron, food etc. Heat and temperature are often used as if they are used as the same thing.. When substance is hot, the temperature is
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