Soil Erosion and Flooding
The lesson covers soil erosion, its causes, and the impact of human activities on soil health. It also discusses methods to control and prevent erosion, as well as the causes and prevention of flooding. Different types of drainage patterns in the community are also described.
- 00:49 “on a given farmland. Number four, student should be able to describe different types of drainage patterns in their community and state the causes of flooding. Number five, student should be able to describe how flooding...”
- 15:48 “You can see in the picture the house as collapsed as a result of flooding. Number two, the damage of properties. Number three, deteriorating of health conditions or into water-borne disease. The people living in this env...”
- 00:02 “Good day, everyone. I am Mr. Ife. The basic science is so tough. And our lesson topic for today is environmental hazards one. A quick run through to the objectives. At the end of the class, students should be able to exp...”
Definition and Classification of Chemicals
This lesson defines chemicals and explains their various forms, including solids, liquids, and gases. It also classifies chemicals their hazardous nature and discusses safety measures when using them.
- 21:57 “hazardous chemicals are those ones that are both toxic and reactive because there are some chemicals that are toxic but not reactive and there are some which are reactive but not very toxic. Now, the ability for a chemic...”
- 23:41 “detergents for washing. We have welding fumes which you find in the instruments for welding called tongs. We have the degreasers. Now, the non-hazardos chemicals are split into two. We have the ones that are known hazard...”
- 22:49 “We have the refrigerants which is used as your refrigerating coolants. We have the drugs and of course your fuel or petrol. The second one are the moderately hazardous chemicals. These particular ones are not two hazardo...”
Careers and Applications in Chemistry
This lesson covers various career paths available for students studying chemistry, including roles in education, engineering, and health services. It also explains the applications of chemistry in food production, medicine, military, and environmental science.
- 03:54 “The next is clothing. The clothes you wear are tester industries, mixtures of the knowledge of chemistry. There is nothing that has a good aspect, has a good part without having a bad part. What I was talking about next...”
- 01:34 “compared to non-evalupling environmentally friendly product. The next is forensic chemistry. You can see these people in the aspect of crime. The enabled also investigate crime very well. The next aspect, very important,...”
- 02:21 “and their lives, which also includes laboratory assistants. The next career part is manufacturing industry. These people are the researchers and chemical engineers. They also involve in manufacturing produce like steel a...”
Solid Minerals in Nigeria
This lesson covers the types of solid minerals found in Nigeria, their locations, and their uses. Students will learn about specific minerals such as limestone and their importance to the economy. A map of Nigeria showing the distribution of these minerals will also be drawn.
- 14:15 “These disturbance can affect the landscape, it can affect the soil, it can affect the vegetation and also the water resources. Potential environmental impact from oil and gas development activities include region. It all...”
- 15:03 “the vegetation is going to kill some of the plants, it's going to be responsible for some of the animal behavioural pattern. Crystallistic of solid minerals. Diamonds. Diamonds is hard with natural state and it is a lot...”
- 09:18 “You can be used for preserving food. You want to preserve your fish or your meat for a long period. Then add the salt to it, and it saves it from microorganisms that will make its perish. No. 3. It is used in the manufac...”
Oxides of Carbon
This lesson covers the two types of carbon oxides: carbon monoxide and carbon dioxide. It explains their formation, characteristics, and methods of preparation in the laboratory. The lesson also defines the term allotrope and discusses the economic importance of these oxides.
- 10:07 “of the pericabal two oxides. So, now, let's now look at the properties of carbon two oxides, basically, for the problem of carbon two oxides, it's colorless, of course, you know that, all right? Almost the colorless, mos...”
- 20:07 “that are classified under what we call acid and hydrides, okay? So, basically, we know that the many points of carbon for oxide is minus 78 degrees Celsius. All right, that's a multi-point minus 78 degrees Celsius. So, b...”
- 33:48 “so for example this is actually used by a manufacturer of glass, so you know, add detergents, okay, so then for this one is deployed in baking powder, or to discharge our carbon-folks, right, so as that helps to reduce t...”