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...”
- 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...”
- 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...”
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...”
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,...”
- 07:02 “And with this class, I believe I can also test you. These are the evaluations. Number one, make sure five carriers that require the knowledge of chemistry. Number two, least five carriers that do not require the knowledg...”
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...”
- 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...”
- 24:50 “when due to the preparation of compounds, so it actually helps in reliving in digestion, or constipation in medical sector. Of course, medical people should be able to explain the use of these to you properly. So, now, f...”