Introduction The first humans were hunters and gatherers who mainly relied on hunting for food. These hunter-gatherers made up a small group of no more than 100–150 individuals. They used to wander about looking for food. There were many early humans living there at the time- Neanderthals, homo sapiens, homo Rhodesians, etc. Only Homo sapiens […]
Introduction The transition from primitive humans to modern humans involved various modifications. Throughout this process, several human lifestyles were observed. They transitioned from being food gatherers to producers. They made numerous discoveries that are still in use in modified form. They then started to create shelters for a prolonged stay in a particular location as […]
Introduction The origin and advancement in the physical features of human ancestors have been termed human evolution. According to this theory, early humans went through a number of stages which converted them from prehistoric man to modern humans. Gradually the development in their brain size permitted them to use their physical attributes more skillfully. Early […]
Introduction The air is a fundamental element of planet Earth that sustains life. The broad term “air” is used to describe the mixture of gases that makes up the earth’s atmosphere. It is a clear gas required for breathing and performing regular cellular activities. Air is a very essential and makes up the atmosphere of […]
Introduction In the farming and agricultural sectors, the tools used to streamline the process are referred to as agricultural implements. To create a productive and helpful environment, agricultural operations today require a different range of tools, such as drills, diggers, furrows, sickles, and so on. Without the use of the implements that are supposed to […]
Introduction We know that a capacitor consists of two plates of conductors separated by an isolated distance and is also known as a dielectric. The capacitor limits or regulates the current when connected to an alternating current source, but it does not completely prevent charge drift. The capacitor gradually charges and discharges as the current […]
Introduction All living things require energy to carry out their many tasks, such as breathing, growth, metabolism, and movement. Because of this, cells need a constant flow of energy to support their development, maintenance, and repair. Although the sun is a good source of energy, not all types of life can use it directly. The […]
Introduction Ray diagrams allow us to ascertain the direction of the light as it moves to a certain location on an image of an item. In the Ray diagram, the incident and reflected rays are shown as lines with arrows. It also helps in determining the path of the light. Spherical mirrors are defined as […]
Introduction Viruses are small highly contagious creatures which live on the threshold of life and death. The most distinguishing characteristic of viruses is to multiply inside the living cells of other species. When this virus enters our bodies, it affects our immune systems, hence weakening us. When viruses enter our body they use the host […]