Introduction to Energy Energy Dictionary Introduction to Energy

Follow the directions on each slide. Now you will do some activities and notes with a partner, using a laptop or iPad. Follow the directions on each slide. Move to the supplies or area you are directed to for the activities. Remember: Take notes from any slide that says “Box #” at the top! You may now meet with your partner, get a device, and start working. 5/21/2019 The NEED Project

For each slide coming up… Read the information. Write the name of the kind of energy. Draw a picture to help you remember that kind of energy. 5/21/2019 Footer Goes Here

Box #5 - Potential Energy (PE) Potential energy (PE) is STORED energy. There are 4 main kinds: Gravitational potential energy Stored mechanical energy Chemical energy Nuclear energy 5/21/2019 The NEED Project

Try some forms of Potential Energy… Station 1 - Try bouncing a ball five times on the table or ground. Where is the energy stored – at the top of the bounce or when it hits the ground? Answer: All of the ball’s energy is stored energy at the top of the bounce, because of its height above ground and its work against the force of gravity! Station 2 - Get a cracker and eat it! Where is the energy stored in the cracker? Answer: The chemical bonds in the molecules of the cracker store energy. Your body digests the cracker, breaks the bonds and releases the energy for you to use for movement and growth! 5/21/2019 The NEED Project

Write this down! Box # 7 Gravitational Energy (PE) The energy an object or substance has because of its position; anything “up high”

Stored Mechanical Energy (PE) Box #8 Stored Mechanical Energy (PE) Energy stored in an object by the application of force Must push or pull on an object

Nuclear Energy (PE) Box #9 Energy stored in the nucleus of the atom It holds the nucleus together and is released when nuclear reactions break up the nucleus.

Box #10 Chemical Energy (PE) Energy stored in the bonds between atoms. It is released when the bonds are broken by a chemical reaction. STATION 3 – Get a mint candy! Think of the CHEMICAL REACTIONS breaking the bonds of the candy as you digest it!

Box #11 – Kinetic Energy (KE) Kinetic energy (KE) refers to energy produced by movement of something. It comes in the form of: Mechanical energy (movement) Electrical energy (electric current) Sound waves (moving sounds) Radiant energy (light) Thermal energy (heat) 5/21/2019 The NEED Project

Try some forms of Kinetic Energy! Try each of the following forms of movement. Take note of which seems to need the most movement! Walk across the room from one side to the other, at a normal pace. Hop across the room on one foot. Crab-walk across the room! Which one takes the most energy? Why? Answer: Walking is probably easiest because your muscles don’t have to work that hard to move you. Crab-walking is probably the hardest since your arm and leg muscles all have to work to move you. The NEED Project

Mechanical Energy (Motion) (KE) Box #12 Mechanical Energy (Motion) (KE) Energy from the movement of objects or substances from one place to another. .

Electrical Energy Box #13   Electrical Energy Is used when electrons move in one direction along a wire. The movement of electrons is called an electric current.

Box #14 Sound Energy (KE) is the energy of sound waves that move through substances like air or water. Station 4 – Use the items at the station to make different sounds. Which do you think have more energy?

Radiant Energy Electromagnetic energy, like light, Box #15 Radiant Energy Electromagnetic energy, like light, x-rays, radio waves, and microwaves, that travel in transverse waves. Station 5 – Put your hands near (not on!) the light sources. How can you tell the light has energy?

Thermal Energy (a.k.a. Heat) Box #16 Thermal Energy (a.k.a. Heat) Internal energy of a substance due to the vibration of the atoms and molecules that make up the substance. Station 6 – Dip your finger into each sample of water. Which one has more vibrations of molecules inside it?

If you are all done… You have some time to try changes in potential and kinetic energy. Imagine you are going to fly a paper airplane. When will all the energy be POTENTIAL energy (stored energy)? When will it have the most KINETIC energy (energy of movement)? Now use some scrap paper to make a paper airplane. Test it at Station #7 by allowing the fan breeze to send it flying! 5/21/2019 Footer Goes Here

Wrap-Up Go back to the beginning of your book. Take turns with your partner reading each box. Can you explain why each source of PE is considered “potential energy” (stored energy? Can you explain why each source of KE is considered “kinetic energy” (energy of movement? 5/21/2019 Footer Goes Here