The Energy Story - Chapter 1: Energy - What Is It?Energy causes things to happen around us. Look out the window. During the day, the sun gives out light and heat energy. When a car drives by, it is being powered by gasoline, a type of stored energy. The food we eat contains energy. We learned the definition of energy in the introduction: "Energy Is the Ability to Do Work." Energy can be found in a number of different forms. Stored and Moving Energy Energy makes everything happen and can be divided into two types: Stored energy is called potential energy. With a pencil, try this example to know the two types of energy. Put the pencil at the edge of the desk and push it off to the floor. Now, pick up the pencil and put it back on the desk. How Do We Measure Energy? Energy is measured in many ways. One of the basic measuring blocks is called a Btu. Btu is the amount of heat energy it takes to raise the temperature of one pound of water by one degree Fahrenheit, at sea level. One Btu equals about one blue-tip kitchen match. 1,000 joules = 1 Btu 1.
ExploreLearning Gizmos: Math & Science Simulations Powering Inquiry and Understanding4-PS: Physical Science 4-PS3: Energy 4-PS3-1: Use evidence to construct an explanation relating the speed of an object to the energy of that object. Sled Wars 4-PS3-2: Make observations to provide evidence that energy can be transferred from place to place by sound, light, heat, and electric currents. Circuit Builder Conduction and Convection Energy Conversions Heat Absorption Radiation 4-PS3-3: Ask questions and predict outcomes about the changes in energy that occur when objects collide. 4-PS3-4: Apply scientific ideas to design, test, and refine a device that converts energy from one form to another. Circuit Builder Energy Conversions 4-PS4: Waves and their Applications in Technologies for Information Transfer 4-PS4-1: Develop a model of waves to describe patterns in terms of amplitude and wavelength and that waves can cause objects to move. Waves 4-LS: Life Science 4-LS1: From Molecules to Organisms: Structures and Processes Hearing: Frequency and Volume Sight vs. 4-ESS: Earth and Space Science