Basic Science Lesson Notes JSS3 First Term

SCHEME OF WORK

Week 1 & 2 – Drug abuse III

Week 3 – Family traits

Week 4 – Environmental hazard (Soil erosion)

Week 5 – Environmental hazard (Bush burning)

Week 6 – Flooding 

Week 7 & 8– Environmental hazard (Deforestation)

Week 9 – Environmental hazard (Desertification)

Week 10 – Environmental hazard (Depletion of the ozone layer)

 

Below are the 2022 complete JSS3 Basic Science First Term Lesson Note 

Lesson Note For JSS3 Basic Science (First Term)

Week 1 – Drug Abuse III

Overview – Drug abuse means taking drugs not according to doctor’s prescription. It could be by either taking overdose or underdose. Modes of drug abuse include self-injection, sniffing, smoking, etc. Drug abuse has so many negative effects, one of which is death. One way of preventing drug abuse is educating people on the dangers of abusing a drug. In Nigeria, the National Agency for Food Drug Administration and Control (NAFDAC) and National Drug Law Enforcement Agency (NDLEA) help regulate and control the use of drugs. This week, we shall learn about drug abuse – modes of drug abuse, the effects of drug abuse and its prevention. To learn more, Click here

Week 3 – Family Traits

Overview – Within families, traits are passed down from a parent to an offspring thanks to genetics. Genetics is defined as the study of heredity and variation in living things. The genetic material contained in every living thing is called DNA. The basic unit of heredity is the gene. Heredity is defined as the transmission of characters from parents to offspring via genes. Variation is defined as the differences which exist between parents and offspring as well as among the offspring. Traits that are passed on from parents to offspring are either dominant or recessive. Dominant traits are traits that keep appearing in each successive generation. Recessive traits are traits present in a living organism that is not physically expressed but may suddenly appear in successive generation. This week, we shall learn about family traits – genetics. To learn more, Click here

Week 4 – Environmental Hazard (Soil Erosion)

Overview – Soil is the top layer of the earth crust. Human activities, such as road construction, farming, the building of houses, etc., take place on the soil. The top layer of the earth could be washed away as a result of water, wind, volcanic action and rainfall. Soil erosion is the gradual wearing away of the surface of the earth (topsoil) through the action of wind, rain, etc. Soil erosion can be prevented by stopping bush burning, mulching, etc. This week, we shall learn about the environmental hazard known as soil erosion. To learn more, Click here

Week 5 – Environmental Hazard (Bush Burning)

Overview – Bush burning is the act of setting forests, weeds and grasses on fire. Farmers clear farmland in preparation for the planting season. The weeds and grasses cleared are often burnt. Certain practices such as hunting, the construction of bridges can influence the burning of bushes. Bush burning can cause some adverse effects on the farmland. It can destroy plants community and even loss of soil fertility. This week, we shall learn about the environmental hazard called bush burning. To learn more, Click here

Week 6 – Flooding 

Overview – Flood occurs when a large amount of water covers an area that is usually dry. Usually, a lack of proper drainage influences flooding. Flooding can also occur when the drainage pattern in a city or town becomes blocked by refuse. Flooding can be controlled by making proper drainage systems and removing materials from the drainage system. This week, we shall learn about flooding – drainage patterns, cause of flooding, its control and effects. To learn more, Click here

Week 7 & 8 – Environmental Hazard (Deforestation)

Overview – Deforestation is an environmental hazard that involves cutting down trees in an area. Trees may be cut down for different uses such as furniture making, urbanization of towns, etc. Without replacing these trees that are cut down, some negative effects take place. Deforestation causes soil erosion, global warming and even food shortage. This week, we shall learn about deforestation.  To learn more, Click here

Week 9 – Environmental Hazard (Desertification)

Overview – Nowadays, there are high increase in environmental disasters caused by man’s activities. Indiscriminate cutting down of trees, mining, overgrazing and bush burning are some of man’s activities that contribute to environmental degradation such as exposing the soil to intense and ultraviolet radiation of the sun, leading to excessive evaporation, and loosening of the soil texture, making the soil easily eroded by wind and water. Desertification is the process by which fertile land becomes desert, typically as a result of drought, deforestation, or inappropriate agriculture. Desertification can be controlled by establishing wind breaks, adopting rotational grazing and so on. This week, we shall learn about desertification. To learn more, Click here

Week 10 – Environmental Hazard (Depletion of the Ozone Layer)

Overview – The ozone layer is located in the stratosphere of the atmosphere. The atmosphere is the region of air above the earth surface. The ozone layer contains other gases and materials apart from ozone. The ozone layer is important for many reasons, one of which is the cooling effect it brings to the atmosphere and the Earth’s surface. The depletion of the ozone layer refers to the gradual reduction of the amount of ozone in the layer due to the widening of the opening of the ozone layer. This can cause global warming, greenhouse effect, ice melting and flooding. A control measure against the depletion of the ozone layer is the regulation on the use of chlorofluorocarbons. This week, we shall learn about the depletion of the ozone layer. To learn more, Click here