Changes of Matter and Atomic Structure
The lesson covers the differences between physical and chemical changes in matter. It explains the concepts of atoms and molecules, their arrangements, and introduces atomic number, mass number, and isotopes. The lesson also includes calculations of relative atomic masses.
- 00:45 “is an example of a physical change. Also, we have change of states, melting, nucleation, solidification, anything that you do at home that is so easy to do. Those are examples of physical change. We also have magnetizati...”
- 00:00 “Good day everyone, my name is Adekunle, I will teach you chemistry. The topic we have now is particularly nature of matter, follow me as we roll. The first is changes of matter, where we have physical change and chemical...”
- 01:39 “very well, you discover that all these changes are not easily reversed. The moment they are formed, you can actually get them back. Also, reaction of matters and trials carbonate for, which dilutes acids, reaction of alk...”
Particulate Nature of Matter
The lesson covers the distinction between physical and chemical changes, including examples. It explains the difference between atoms and molecules, describes the arrangement of particles in an atom, and defines atomic number, mass number, and isotopes. The calculation of relative atomic masses of a
- 05:36 “ammonium chloride. We saw these as examples of substances that can subline. Change directly from solid to geostate. You can still get your substances back. So that's a physical change. Magnetization of iron. When you hol...”
- 04:00 “heat change. Examples of physical and chemical changes are given. Physical changes we have examples like the solution of common salt in water. When you pour your salt in water, it dissolves. It looks like you are not see...”
- 03:09 “equally have chemical changes. We are new substances are formed. Roasting of iron is also a chemical property of iron. Since a new substance, iron, iron loss, iron loss is a new substance entirely. Quite different from i...”
Heat and Temperature
This lesson covers the definitions of heat and temperature, their differences, and the effects of heat on substances. It explains the kinetic molecular theory and how heat causes changes in state, such as solid to liquid and liquid to gas.
- 03:55 “So, for that example, we discover that the states are changing. From solid, when it is ice, to liquid, when it is water, and to vapor, when it is gas or steam. Then, one other effect of heat is there is always change, or...”
- 03:09 “there's always change and increase in the temperature of the body. Likewise, one of the effects is change of states. Where substances are heated? It's either they change from solid to liquid or from liquid to gas. Take,...”
- 00:02 “Good day, everyone. My name is Tabelo A.A. A Physician for today. The topic for discussion today is heat energy. Lesson of objectives. At the end of the lesson, the students should be able to one, define heat and tempera...”
Work, Energy and Power
This lesson covers the definitions of work, energy, and power. It explains potential and kinetic energy as forms of mechanical energy. The lesson also includes calculations related to work done and the concept of power as the rate of doing work.
- 09:52 “You prove what we call a teen plate. We also have chemical energy. Chemical energies are stored in bones. We have covalent and ionic bones. Now, these kind of energies exist in atomic, molecular or element states. Now, t...”
- 00:00 “Hello students, my name is Uche Ugo, the subject is basic science and I will be taking the topic work energy and power. At the end of this lesson, I would expect each student to have achieved several objectives. The firs...”
- 09:04 “It can also be converted into electrical energy, as we see in our source of light, like our solar panel and our inverters we use in our homes. Sound energy, this one works on the principle of wave movement. The wave part...”
Fundamental and Derived Quantities
This lesson covers the definitions of fundamental and derived quantities in physics. It explains how fundamental quantities serve as the base for deriving other quantities and the importance of measurement in physical science.
- 00:45 “of the first topics in the syllabus "Physis". When we talk about "Physis", what do we mean by "Physis"? We talk about the story of natural phenomena, which has to be with an event or fact that is hard to explain sometime...”
- 01:34 “means of experiments conducted. So measurements, which is the major, which is the core of today's topic, is an integral part of experiments. We are the magnitude and the relationship among different physical quantities a...”
- 25:24 “So the last one is in terms of units, the unit of mass is kilogram and that of weight is newton. Evaluation, divine, fundamental and the life quantity in your own language to the best of your knowledge. So explaining tha...”
Sources of Energy
The lesson covers different sources of energy, including renewable and non-renewable types. It explains how energy is used in society and discusses the environmental impacts of various energy sources. Specific examples include petroleum, natural gas, solar energy, and wind energy.
- 10:58 “These are the energies that can never be replaced. After they are being used, they can never be replaced again. Now, we have, for example, as nuclear energy, when this one is being replaced in the environment, it can nev...”
- 10:10 “Or these are energy that can be replaced. Now, we have energy that can be replaced. After they are being used, we are to replace it back so that it can be able to be used in another form. When these energy are being used...”
- 14:53 “That is part of what energy is useful in our society for domestic equipment. A lot of things, domestic equipment. We can do a lot of things with energy. You can do things a lot with energy. All right, let's talk about th...”