Radiation, Conduction, And Convection


Before we continue our discussion on how heat affects our environments, let’s explore how heat is transferred from one object to another. There are three natural processes that can be used to transfer heat. These processes are called radiation, conduction, and convection. Radiation All objects radiate energy and heat, even your own body. However, the […]

The Earth Has Spheres


Scientists divide our home planet into three spheres. Each sphere is categorized according to its physical characteristics. These spheres are the Atmosphere, which is made of all the Earth’s gases; the Lithosphere, which is made up of all the Earth’s physical materials, such as rocks and soil; and the Hydrosphere, which is made up of […]

The Earth’s Crust


For many years it was believed by geologists that the location of the continents was fixed. These scientists believed that the locations of the continents was determined many billions of years ago, as the young Earth cooled down from its original state as a ball of molten lava. It was believed that the continents were […]

Our Five Senses


A World of Senses As you read about the human body on our website, hopefully you are learning. But how does the information get from our website into your brain? If you rest your head on the computer screen, will the information seep into you as you sleep? Or does it take a little more […]

The Nervous System


As you read this article, hold your hand out in front of you. Now, wave hello at yourself. Okay, now tap yourself on the head. All right, now lets try this same experiment again, only this time we will do it a little differently. Put your arm down. Now look at your other arm. Say […]

The Endocrine System


The endocrine system is used for communication, throughout your body. The main communication system within your body is the nervous system. The nervous system works in a similar manner as a telephone. Messages are sent from one place to another place, much in the same way that a telephone carries a message from you to […]

The Excretory System


Our cells create waste As your body performs the many functions that it needs in order to keep itself alive, it sometimes produces wastes. These wastes are chemicals that are toxic, and that if left alone would seriously hurt or even kill you. For example, as your cells break down amino acids, they produce a […]