Slide 1 / 59 Slide 2 / 59 New Jersey Center for Teaching and Learning Progressive Science Initiative This material is made freely available at www.njctl.org and is intended for the non-commercial use of Energy in Everyday students and teachers. These materials may not be used for any commercial purpose without the written Life permission of the owners. NJCTL maintains its website for the convenience of teachers who wish to make their work available to other teachers, participate in a virtual professional learning community, and/or provide access to course www.njctl.org materials to parents, students and others. Click to go to website: www.njctl.org Slide 3 / 59 Slide 4 / 59 Table of Contents Click on the topic to go to that section Stored Energy Forms · Stored Energy Forms · Lost Energy · Transformation of Energy · Defining Engineering Problems Return to Table of Contents www.njctl.org Slide 5 / 59 Slide 6 / 59 Stored Energy Forms Stored Energy Forms We have learned there are many types of energy. Can you name the forms of energy pictured here? Return to Table of Contents Spring www.njctl.org wind Light
Slide 7 / 59 Slide 8 / 59 What are these forms of energy? Which one is the Energy that is stored is energy that can be useful, and saved for use at another time. It is often in a form that can be most important source of moved from one place to another energy on earth? Can you think of examples of stored energy? Food/Chemical Solar Nope, not a light bulb. Mechanical, creating heat. Slide 9 / 59 Slide 10 / 59 1 Food such as bread, cake and beans comes from Chemical Stored Energy - Food A other animals Pull Pull You are busy in school. Talking, writing, learning and thinking B plants all need energy. Where do you get your energy? C the sun D both B and C are correct Slide 11 / 59 Slide 12 / 59 2 The Sun is the most important source of energy on Earth. Food is stored chemical energy. Yes Pull Pull No We make food from plants, or we just eat plants. Where do plants get their energy? We cannot go out in the sunshine and get energy to do things. Plants use sunshine to create sugar, which they store in their roots, or stems, or leaves and fruit.
Slide 13 / 59 Slide 14 / 59 3 This bean is using energy stored in its seed to grow. This is a form of ______ energy. Why do plants store energy? Pull Pull A light Plants store energy for many reasons. Plants store energy in B spring their roots so they can make leaves in spring. Pull Pull Humans and other animals eat the roots to give ourselves C electric energy. D chemical Slide 15 / 59 Slide 16 / 59 Types of Fuels Stored Chemical Energy - Fuel Match the fuel to the use of that fuel. You either walked to school, or you were driven in a car or bus. We have seen how you got energy, but what about a car? Gasoline is a fuel that releases energy to a car when it is burned. A car must have a form of stored energy that can go with it. When the energy is used, the driver needs to get more gasoline. Slide 17 / 59 Slide 18 / 59 Batteries are great sources of stored energy! Electricity can be stored energy. Different types of batteries have specific uses. What do you When electricity is flowing in a wire, that is not stored energy. use batteries for? However, electricity can be stored in batteries. Do batteries fit the criteria? Portable? Do not need to be used immediately? Do they give energy in a specific way? This battery is rechargeable. It is storing electricity for use someplace else.
Slide 19 / 59 Slide 20 / 59 4 A fuel is a substance which 5 Which of the following are NOT important when storing energy? Pull Pull A is burned Pull Pull A It should be portable D B can be solid, like wood B the energy flows out and can not be stopped C can be liquid, like gasoline C the energy is saved for a later use D all of these are true D it can be used for a particular purpose Slide 21 / 59 Slide 22 / 59 6 Which of the following are a correct pair of use and fuel? Gravitational Potential Energy (GPE) A fire - battery All "Gravitational Potential Energy" means is that when things are lifted, they can do work. Pull Pull B lamp - wood Here is an example. The part of the river on the left is higher C car - gasoline than on the right. The water has has GPE. As it flows, the wheel turns. D clock - wood Slide 23 / 59 Slide 24 / 59 7 A student jumped on the ramp shown and the rock rolled away. The student is using ______. GPE Continued Pull Pull A Gravitational Potential Energy Falling rocks can do "work" on a car. The energy in the rocks on top B Stored electric energy of the cliff is stored until the rocks are pushed. C Battery power A hammer is a tool that relies on human power and GPE. As the hammer falls, the hammer head strikes the target. D a fuel It would be painful if this fell on a finger.
Slide 25 / 59 Slide 26 / 59 Pull Pull Spring Energy More Energy Stored in Springs Springs store energy when they are compressed or stretched from the "at rest" position. This toy car needs to be wound up with a special key. There is a spring inside which is being stretched. When the car is released, the spring will contract and make the wheels turn. A Nerf gun uses springs to shoot foam bullets. A trampoline, carabiner, a spring board and leaf springs on tires all use the energy in springs to do a Push to link to a quick job. Can you explain each? video about Potential Spring Energy. Slide 27 / 59 Slide 28 / 59 8 In this picture, a man is bungee jumping over a gulf of Springs act as shock absorbers! water. The energy that saves him from falling in the water is from The springs in this seat absorb the energy from a rough terrain. The rider would be very uncomfortable if bicycle Pull Pull A his feet, which have to hold tightly to the rope. seats didn't have springs. Do you know other examples of springs acting as shock B the bungee, it is a spring which pulls him up. absorbers? C he will fall in the water D he's doomed! Slide 29 / 59 Slide 30 / 59 Think for a minute about being cold.... Brrrr! Lost Energy What are actions you take to stay warm on a chilly day? Or when you get out of the shower? Return to Why do you do those things? Table of Contents How does that keep you warm? www.njctl.org
Slide 31 / 59 Slide 32 / 59 What is happening? Heat energy is the most common energy to be lost. When you are wet, or in cold air, your body loses heat energy! In this picture, you can see how heat energy is lost from a human hand. This is natural. YOU wear clothes, dry off, put on a hat and coat, etc. You are keeping the heat close to your body. In every engine that uses fuel, some of the fuel is lost to heat. Once the heat energy leaves your body, can you get it back? In an incandescent light bulb, Can it be a fuel for anything else? most of the energy is not used for the purpose of becoming light, it becomes heat! If you have ever touched this kind of bulb after it has been on awhile, you may have gotten burned! Slide 33 / 59 Slide 34 / 59 What is Heat Energy? Lost Energy Heat is the movement of molecules. If there is a lot of Things which lose energy can be judged as efficient or movement, we say there is a lot of heat. inefficient . An efficient car converts more of the gasoline it uses to Atoms "wiggle"and bump moving the car, and less is lost as heat. It has a high "mpg" each other. The more energy rating. they have, the faster they An inefficient car has a low mpg rating. More of the gasoline move. turns to heat. Slide 35 / 59 Slide 36 / 59 Lost Energy - Sound "Sound Activated" Sound is another form of energy that once released, can not There are many examples of sound activated toys, switches and be recaptured. We can not use sound energy to charge a phone, or run a computer. T-shirts. Sound waves trigger the "start" button, but they do not power the toy or shirt. Push to see a sound activated toy. When the sound is over, the energy is lost to the air.
Slide 37 / 59 Slide 38 / 59 9 The image below show an engine losing heat. The white 10 One way to prevent heat loss from your body is to area is where the most heat is lost. We would call this engine A stay dry Pull Pull A efficient Pull Pull B wear warm clothes B inefficient C wear a hat C neither D all of the above Slide 39 / 59 Slide 40 / 59 11 Heat or sound energy that leaves a machine or person is 12 Atoms or molecules that move quickly are said to have considered lost energy. _____ energy. Pull Pull Yes A Heat Pull Pull No B Action C Light D solar Slide 41 / 59 Slide 42 / 59 Energy transformation means to turn one type of energy to different type of energy. Transformation of Energy In this animation, a person is using chemical energy (from their food) to jump high, which gives them gravitational energy. Return to Table of Contents www.njctl.org
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