What is energy? The concept of energy is a complex one that can have many meanings, both scientific and colloquial. You may not have the knowledge to teach your students the scientific definition, but you can still begin by exploring their own ideas about the concept. It’s helpful to use the Picture of Practice page to explore the video and provide context for the activity. You can also include reflection opportunities on what students learned. Here are some examples of the type of lessons you can implement using this video.
Kinetic and potential energy are two types of energy. Kinetic energy is energy that is produced by movement. Potential energy is the stored energy inside a physical object that’s waiting to do work. This energy can be converted into kinetic energy. In contrast, chemical energy is energy produced by a reaction between two chemicals. But if we are to compare these two types of energy, we’ll find that they are different, but both involve movement.
The term “energy” comes from the Ancient Greek word energeia, which means “activity.” The term first appeared in Aristotle’s work in the 4th century BC. In addition to being a qualitative philosophical concept, energeia was also related to pleasure and happiness. Despite its seemingly abstract definition, energy is present everywhere. And it is crucial for the creation of motion. So how can you use energy?
One example of how renewable energy is beneficial to the environment is in the clothing industry. If an individual buys clothing in another country, they may be using less energy than they would consume by purchasing the same garment in the same country. The same goes for energy used in the clothing supply chain. When a consumer buys a pair of jeans from another store, the energy that they consumed will be replenished by the clothing company. The process of manufacturing clothing requires a large amount of energy, which may be expensive.
The unit of energy used in scientific calculations is the joule, derived from the Greek word energeia. One joule represents the amount of energy used to apply one newton of force over a distance of one metre. The joule is often expressed in non-SI units, such as kilograms or pounds. However, if expressed in SI units, you will need to apply a conversion factor.
An everyday definition of energy is very similar to the formal definition. Simply put, energy is the ability to do work. Energy transfers from one object to another in order to produce work or heat. As a result, the term “energy” has many uses. It is necessary for all of life on earth. For example, you must have energy to play outside, bike, read, cook, ride a bicycle, and turn on the lights. It is also necessary for electricity.
In physical terms, energy can be classified into two categories – kinetic and potential. Kinetic energy occurs before and during an action, whereas potential energy is the ability of an object to have motion. For example, when holding a physics textbook in the air, there is potential energy in the book. Once the handbrake is on, this potential energy converts into kinetic energy. You can see this principle in action all the time.
The uncertainty principle is a useful tool when analyzing the concept of energy. While this principle is not a substitute for energy conservation, it does provide a mathematical framework for measuring and comparing energy levels. When determining how much energy a given object has, you must consider how much is actually in the mass of the object. Similarly, a steel ball adds thermal energy and mass. You can calculate the amount of energy in a steel bearing by using the joule symbol.
Energy is stored in various forms and is obtained through chemical reactions. The potential energy contained in food is broken down in the stomach by stomach acid, and these molecules travel to the parts of the body that require energy. Without this process, you would feel “drained” and “tired”.