Meaning of renewable and non-renewable energy Renewable energy is the energy resources that can be replaced as they are used up. Non-renewable energy is the energy resources that cannot be replenished as they are used up. Examples of renewable and non-renewable energy Examples of renewable sources of energy are: Sun Wind Water Biomass Sea (tides) […]
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Pollution is the contamination of our environment with dirty, poisonous and dangerous or hazardous substances. It is also defined as the release of waste products or materials into the environment that is harmful to life. These dirty, poisonous and dangerous or hazardous substances are called pollutants. Types of pollution Air pollution Water pollution Soil pollution
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Meaning of Energy Energy is defined as the ability or capacity to do work. The unit of energy is Joules (J) Sources of Energy There are two main sources of energy, the natural and the artificial sources of energy. The natural sources of energy are: Sun Food Natural gas Coal Wind Crude oil Wood Water
Electrical energy are needed in industries ,officers and home for carrying out numerous essential operation for instance blender at home , television, iron and fridge all make use of electrical energy to operate . Electric current is the flow or electron from one point to another in a circuit in a metallic conductor called wires
When an object is dropped from above the ground, work is done as the object is pulled to the ground. As the object is falling and work is done, the potential energy of the body is changed to kinetic energy. In principle, the quantity of potential energy stored in a body is always equal to
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Radioactivity is the spontaneous disintegration of the nucleus of an atom of an element. Radioactivity involves nucleus reactions. A chemical reaction involves the movement of an element in its nucleus, and the force holding the nucleus becomes weaker. Such an atom becomes unstable, it may break up on its own accord with the emission of
ABORTION: Is defined as the deliberate termination of human pregnancy. It ends the pregnancy by removing the foetus and embryos before it can survive outside the uterus. TYPES OF ABORTION INDUCED ABORTION: This is the intentional decision of a woman to end the pregnancy through surgery or by taking medicine. 2. SPONTANEOUS / MISCARRIAGE ABORTION:
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A machine is defined as any arrangement that enables work to be done easily. Types of machine There are different types of simple machines ; lever, pulley, wheel and axle, inclined plane, screw and jack and hydraulic press .A machine is made of three important parts namely; pivot or fulcrum, effort and load. The effort
CHARACTERISTICS OF PLANTS AND ANIMALS Plants exist in different forms. These are: Treesg. mango, orange, guava, pawpaw, etc. Flowers such as ice plant, hibiscus, yellow bush, pride of Barbados, etc. Herbs like crotalaria, carpet grass, Bahamas grass etc. Animals can be classified as: Vertebratesg. man, cat, goat, sheep, cow, chicken, rabbit etc. Invertebratesg. tse-tse fly,
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Sound is a form of energy and transfer in form of wave to the listener through a medium by vibration Sound is transmitted through a medium in the form of vibration or wave reach the human ear , the waves as sound Sound are classified into two classes (i) musical sound (ii) noise Musical sounds
Skill acquisition is a special ability impacted on somebody as a result of training to do something well. REASONS FOR SKILL OF ACQUISITION (1) To get employment (ii) To be self employed because they don’t want to be under anybody (iii) For decision making Iv For risk taking V For managing emergency situation Vi For
Effects of air pollution.
(1) It can lead to respiratory diseases (when smoke, soot and dust is inhaled)
(2) Smog can reduce visibility and cause respiratory diseases
(3) High concentration of carbon (ii) oxide can cause brain damage
(4) It can cause cancer
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Reproduction is the ability of living things to produce young ones like them. Reproduction is one of the characteristics of living things which is for the continuation of life. There are two types of reproduction. Asexual reproduction Sexual reproduction Asexual reproduction – this kind of reproduction involves a single parent to produce young ones. In
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Meaning of Radioactivity Radioactivity is the spontaneous disintegration or breaking down of the nucleus of an atom which makes it give out or emit radiation. Any element that disintegrates spontaneously and release rays us called a radioactive element Discovery of Radioactivity Radioactivity was discovered by a French physicist called Henri Becquerel in 1896. He
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Feeding All animals eat food. The food they eat may be different. Some animals feed on banana, some animals eat beans, some cassava, some eat chick, some eat grass, some feed on maize, some eat leaf, some eat rat while fishes eat worm. Movement All animals can move. A goat can walk and it can
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Animals are living things which means they can perform the characteristics of living things which include reproduction, feeding, movement etc. Animals cannot produce their own food themselves. They rely either directly or indirectly on the food produced by plant. Animals breathe in oxygen that is produced by plant. Examples of common animals: butterfly, cat, cock,
Parts of the human body includes:- Head, eye, nose, mouth, arm, hand, knee, leg, foot, toes etc. Each part of the body is useful to us, part of the usefulness includes:- Part of the body Use Part of the body Use Eyes To see things Mouth To talk and to eat Nose To smell things
Soil is the top most layer of the earth where plant grow and animal walk Do you know that soil is very important to us? For example, we plant seeds in the soil in our farms and our school gardens. We also use soil for making bricks and pots. There are three different types
Energy is used up when work is done. The energy stored up in our muscular system is made available when we are to do work. The stored-up energy (potential energy) is converted to kinetic energy as work is being done. MEANING OF WORK, ENERGY AND POWER Work Work is done whenever a force is applied
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Plants are living things that can be found in our environment. Plants can manufacture their food by themselves making use of water and energy from sunlight through a process called photo they thesis. Plants take in carbon dioxide produced by animal and give off oxygen that is needed by man for survival Parts of