That’s Shocking www.attheworks.org Grade Levels: Grades K - 8 Concepts: Atoms to Electricity Static and Circuit Electricity Conductors and Insulators Potential and Kinetic Energy Energy Transfer Objectives: Students will explore static electricity in depth with this hair-raising experience. They will also discover the link of atoms to electricity, look at the different types of electricity (static and circuit) and get a brief introduction to conductors and insulators. Upper level students will get the chance to explore energy transfer and work to identify different forms of energy. Ohio’s New Learning Standards: Science Grade 1 Grade Band Theme: Observations of the Environment Strand: Earth and Space Science Topic: Sun, Energy and Weather Content Statement: The sun is the principle source of energy. Grade 3 Grade Band Theme: Interconnections within Systems 1 Strand: Physical Science www.attheworks.org Topic: Matter and Forms of Energy Content Statement: Heat, electrical energy, light, sound and magnetic energy are forms of energy. Grade 4 Grade Band Theme: Interconnections within Systems Strand: Physical Science Topic: Electricity, Heat and Matter Content Statement: Energy can be transformed from one form to another or can be transferred from one location to another. Grade 6 Grade Band Theme: Order and Organization Strand: Physical Science Topic: Matter and Motion Content Statement: All matter is made up of small parts called atoms. Content Statement: There are two categories of energy: kinetic and potential. Grade 7 Grade Band Theme: Order and Organization Strand: Physical Science Topic: Conservation of Mass and Energy Content Statement: Energy can be transformed or transferred but is never lost. Content Statement: Energy can be transferred through a variety of ways. Grade 8 Grade Band Theme: Order and Organization Strand: Physical Science Topic: Forces and Motion Content Statement: There are different types of potential energy. 2 www.attheworks.org Classroom Connections: Either before or after your visit The Works recommends that you investigate these words and phrases in your classroom. Atoms Friction Insulators Protons Electricity Attract Electrons Neutrons Nucleus Energy Static Circuit Conductors Repel Literacy Links: Boothroyd, Jennifer. All charged up: a look at electricity. Minneapolis, MN: Lerner Publications, 2011. Print. Cast, C. Vance, and Sue Wilkinson. Where does electricity come from?. Hauppauge, NY: Barron's, 1992. Print. Cole, Joanna, and Bruce Degen. The magic school bus and the electric field trip. New York: Scholastic Press, 1997. Print. Donnell, Liam, Richard Dominguez, and Charles Barnett. The shocking world of electricity with Max Axiom, super scientist. Mankato, Minn.: Capstone Press, 2007. Print. Parker, Steve. Electricity. Rev. ed. London: DK, 2005. Print. Williams, Brian, David Antram, and Karen Barker Smith. Faraday, pioneer of electricity. Hauppauge, N.Y.: Barron's, 2003. Print. Extensions at The Works: Zap Lab • Discover how electricity and magnetism are related. Build and test your own working circuits. Additional Resources: http://www.bbc.co.uk/schools/scienceclips/ages/6_7/electricity_fs.shtml 3 http://www.neok12.com/Electricity.htm www.attheworks.org http://205.254.135.24/kids/energy.cfm?page=electricity_home-basics http://science.howstuffworks.com/electricity.htm http://www.energyquest.ca.gov/story/ 4 That’s Shocking Pre Visit Activities www.attheworks.org Charged Up Objective: Students will observe the effects of a collection of electrons. Materials: • • • Balloon Sink Flowing Water Procedure: 1. Distribute balloons to students. 2. Have students blow up and tie balloons. 3. Students will need to build up static by creating friction between the balloon and another surface. a. Have students list surfaces that could be used to created friction. b. Test different surfaces to see if they produce the same results. 4. Once static has been built up on the balloon turn on water in the sink. 5. Have students move their balloon, charged side first, toward the flowing water. 6. Observe and discuss results. a. What happened to the water? b. Did the substance used to build up static matter? Possible Extensions: • Repeat the experiment using the same surface to build up static, but vary the amount of time the balloon is charged. o Did the amount of time spent charging matter? • Repeat the experiment but vary the same and size of balloons used. o Did the shape or size of the balloon make a difference? What Happened? Electrons have a negative charge and they’re the particles that move around to create electricity. Since electrons are not stored within the nucleus of an atom they can more easily be moved than protons (the positively charged particles inside the nucleus). Electrons flow when there is a disturbance. This 5 www.attheworks.org disturbance can be as little as two atoms rubbing together creating friction. Electrons that are separated due to friction tend the clump together. These clumps of unmoving electrons create static electricity. Static electricity is very common. We’ve all experienced it before whether it be from socks sticking together in the dryer, a balloon rubbed on our head, or the most powerful form, lightening, it’s all around us all the time. 6 LEDs – Current Electricity www.attheworks.org Objective: Students learn and understand the properties of LEDs and current electricity. Materials: • • • • • • • Light Source Print Outs o 65 watt LED Bulb Add with Price o 65 watt CFL Bulb (fluorescent) Add with Price o 65 watt Incandescent Bulb Add with Price CR2025 – 3 volt disc battery o We recommend ordering from Digi-Key (www.digikey.com). LED Light o We recommend ordering from Newark/element14 (www.newark.com) part number 40K0061. White Paper Water Paper or Science Journals Pencil Procedure: 1. Split students into pairs. 2. Distribute a disc battery and LED Light to each pair of students. 3. Have students independently explore the properties of the LED. a. Current only flows in one direction through the LED. b. The LED does not lose much energy in the form of heat, unlike an incandescent bulb. c. Both ends of the LED must be in contact with the battery in order for it to light up. d. The LED must “straddle” the battery in order to work. e. By holding one end of the LED against one side the battery and tapping the other end against the other side, the LED will flash on and off. 4. Students should share their results and discuss findings. 5. Ask students to create a list of devices where they have seen LEDs used. 7 www.attheworks.org a. This list may include Christmas lights, coffee makers, computers, TVs, remotes, etc. 6. Compare and contrast the lists the students created. 7. Show students the Add printouts and ask them to make some observations. 8. Have students discuss the cost differences and why they think they exist. Possible extensions: • Allow students access to other types of bulbs to compare energy efficiency. What Happened? Students will discover that for electricity to flow through a circuit it must be complete and closed. When an LED (Light Emitting Diode) is placed into a circuit it creates a one-way path for electricity. Think of this like a locked door, when you are inside you can get out of the locked door, but when you are outside you cannot get back through the same door. That is exactly what an LED does to electrical current. 8 Butterfly Electroscope www.attheworks.org Objective: Students will discover static electricity and observe the effects of static charges on a tissue paper butterfly’s wings. Materials: • • • • • • • • • • • • • Paperclip Empty Glass Jar Modeling Clay Aluminum Foil Colored Tissue Paper Plastic Ruler Wooden Ruler Scraps of various fabrics o Nylon o Wool o Cotton o Fur Objects from around the room o Balloons o Pens o Pencils o Styrofoam o Saran Wrap Glass Rod (optional) Rubber Rod (optional) White Paper Scissors Procedure: 7. Split students into groups of 3 – 4 students each. 8. Distribute a paperclip, empty glass jar, modeling clay, aluminum foil, tissue paper, plastic ruler, wooden ruler, scraps of fabric, glass rod (if being used), rubber rod (if being used), white paper and scissors. 9. Have students fold the paper twice lengthwise, making three columns. a. Label columns with the following headers. 9 i. Object ii. Type of Cloth iii. Wings Move? 10. Uncurl the paperclip so that it makes a hook shape. www.attheworks.org 11. Roll a small piece of aluminum foil into a ball and poke the end of the paperclip through so that it sticks. 12. Cut a small butterfly (template provided above) out of tissue paper, crease it down the middle and lay it across the portion of the paperclip inside the jar. a. If cutting out a butterfly shape is too difficult or too much of a distraction for your students, a simple thin strip of tissue paper creased in half and placed over the paperclip will work fine. 10 www.attheworks.org 13. Rub the plastic ruler with the nylon scrap and place the ruler near, but not touching, the foil ball. Have students observe what they see happening, if anything, with the butterfly. 14. Experiment by rubbing any combination of other fabrics or fur with the plastic ruler, the wooden ruler, glass or rubber rods, and any number of objects from around the room. 15. On their papers or white boards, have them fill out the columns appropriately as shown below. Object Type of Cloth Wings Move? Plastic Ruler Nylon Yes Wooden Ruler Wool No Balloon Cotton No Balloon Wool Yes Styrofoam Wool Yes Possible Extensions: o Have students discuss the invisible force that makes the butterfly’s wings flap. o Students could draw a picture of what they think the force would look like if it could be seen and discuss why they made their choice. o Discuss the objects that were used and their similarities and differences. Did it matter if the materials were conductors or insulators? 11 What Happened? www.attheworks.org “Static” electricity is generated by friction between two or more objects and tends to discharge all at once (think being shocked by a doorknob after walking on carpet) as opposed to current electricity that flows through wires and powers most of our modern appliances. When students rubbed the fabric on different object they were building up static. However, as they would have observed not every type or material and/or object was able to cause the wigs to “flap”. The wings flapped when the materials were able to create an electrical charge. 12 That’s Shocking Post Visit Activities www.attheworks.org Power to Go Objective: Students learn and understand the conservation of mass by using a triple beam balance to measure the various components of a system both before and after the reaction. Materials: • • • • • • • Lemons Copper Wires Pennies Large Metal Paperclips Digital Clock Scissors Knife Procedure: 9. Split students into groups of 3 – 4 students each. 10. Distribute two lemons, three copper wires, two pennies, two large paperclips, digital clock, scissors and a knife to each group. 11. Have students attach one penny to the end of one copper wire and attach a paperclip to the other end. 12. Have students attach one penny to the end of another piece of copper wire. 13. Have students attach one paperclip to the last piece of copper wire. 14. Squeeze and roll the lemons. 15. Make two small cuts on the top of each lemon approximately one inch apart. • Students may need adult assistance with this step. 16. Set the lemons side by side and use the copper wire with the penny and paperclip to attach them. 17. The penny should be in one lemon and the paperclip in the other. 18. Make sure the penny and the paperclip are both in the pulpy part of the lemon. 19. Using the wire with just the penny attached place the penny into the second hole of the lemon with the paperclip. 20. Using the wire with only the paperclip attached place the paper clip into the second hole in the lemon with the penny. 21. Connect the free wire ends to the terminals of the digital clock. 22. If your clock isn’t running try switching the wires. 23. Observe and share results 13 Possible extensions: • Try potatoes or other citrus fruits. • Replace paperclips with vinyl-covered paperclips. What happened? www.attheworks.org What Happened? Batteries work because of an imbalance of electrons, meaning there are more electrons stored on the negative end of the battery and when the ends are connected those negative charges seek out the positive charges on the opposite end, creating an electron flow. Electricity! Chemical reactions between the lemon juice and the copper penny and steel paperclip pushed electrons through your wires. An imbalance is created because of the different metals. 14 Magnet Maker www.attheworks.org Objective: Students will understand the electricity and magnetism are related. Magnets can be used to create electricity and electricity can be used to create a magnet. Materials: • • • • • Teaspoon (stainless steel) 9-volt battery 3ft of insulated wire Paperclip Testing materials of your choice o Paper, fabric, iron, nickel, pencil lead (graphite), plastic, glass, wood, tap water, etc. Procedure: 1. Before giving the wire to students strip the plastic insulation from both ends of the wire to expose the metal inside. 2. Split students into groups of 3 – 4 students each. 3. Distribute a teaspoon, 9-volt battery, insulated wire with striped ends, paperclip and testing materials to each group. 4. Have students wrap the wire approximately 40 times around the handle of the spoon. a. Be sure to leave about one foot of wire on each end after wrapping. 5. Students should wrap each end of the wire to a battery terminal. 6. Students should tap the spoon to their paperclip. 7. Observe and discuss what happened. a. If the spoon picked up the paperclip you have successfully created a magnet using electricity. b. These types of magnets are called electromagnets. 8. Have students test other materials using their electromagnet. 9. Record whether the items were magnetic or nonmagnetic. 10. Discuss your findings. Possible extensions: • Try to pick up more than one paperclip at a time. How many paperclips were you able to pick up? • Vary the type of battery used. Did you notice a difference in charge? What Happened? 15 www.attheworks.org On its own steel is not a magnet, but by passing electricity through the material you can create a very strong magnet. 16 Conductors and Insulators www.attheworks.org Objective: Students will discover that chemical reactions help us to clean our dishes, clothes and even hands every time we wash them. Materials: • • • • • • • CR2025 – 3 volt disc battery o We recommend ordering from Digi-Key (www.digikey.com). LED Light o We recommend ordering from Newark/element14 (www.newark.com) part number 40K0061. Small Pieces of Hook Up Wire with Ends Stripped o One Red and One Black Needle Nose Pliers Electrical Tape Assorted Objects to Test for Conductivity o Metallic items, paper clips, keys, coins, foil, pull tabs, graphite lead, etc. Paper Procedure: 11. Split students into groups of 3 – 4 students each. 12. Distribute a battery, LED Light, one red hook up wire, one black hook up wire, electrical tape, needle nose pliers and items to test for conductivity. 13. Students will then “build” the LED test circuit. • Depending on grade level you may want to assemble the test circuits and merely have students test items for conductivity. 17 www.attheworks.org 14. Attach one end of the red hook up wire to the top, or positive end (marked with a +) of the battery with a piece of electrical tape and set it aside. 15. Test LED on battery (as done in LED – Current Electricity above) to make sure which lead from the LED attaches to the bottom, or negative end of the battery. 16. Using the needle nose pliers, twist one end of the black hook up wire together with the negative lead of the LED. a. That’s the lead that would attach to the bottom of the battery. b. Make sure the connection is secure and that both wires are touching at all times. 17. Attach the other end piece of the black wire to the bottom, or negative end of the battery, with a piece of electrical tape. 18. Gently touch the free end of the red wire and the free positive lead of the LED together to test if the LED will light. 19. Select an object and test its conductivity by touching both the red wire and the positive LED lead to the object. If the LED lights up, the object is a conductor (electricity flows through it). If the LED does not light up, the object is an insulator (electricity either does not flow or has difficulty flowing through it). 20. Students will keep track of which items are conductors and which are insulators on the piece of paper. 21. Compare and contrast each set of items and discuss what features are necessary to make a conductor. 22. Discuss the items that lit the LED. a. What did the conductors have in common? b. Was there any exception to the “rule”? i. Graphite Possible extensions: • Have students observe the hook up wires. a. Discuss the materials that make up the wires. b. The inside of the wires is metallic and conducts electricity, but the outside of the wire is incased in rubber, an insulator that protects the wire damage and us from being shocked. • Discuss how moving the conductors in and out of the circuit might relate to a switch in a circuit. What Happened? Students will understand the difference between conductors and insulators. Conductors allow electricity to continue to flow, but insulators either stop or inhibit the flow of electricity. Generally, metallic items 18 www.attheworks.org are good conductors or electricity. Plastics on the other hand do not conduct electricity well. By testing different types of items students will be able to see the effects of conductors and insulators on the flow of electricity. 19 www.attheworks.org Energy Expert Objective: Students will identify different types of energy and energy transfer. Materials: • • • • Index Cards Pencils Playground Energy Type Scavenger Hunt Sheet Type of Energy Where Observed Chemical Energy Human Body Evidence Food that is consumed creates a chemical energy as it is broken down in our bodies allow us to do work throughout the day. Procedure: 1. Review types of energy. a. We recommend students visit http://www.eia.gov/kids/energy.cfm?page=about_forms_of_energy-basics or pull the website up for the class as a whole. 20 www.attheworks.org b. There are two main types of energy; potential and kinetic, but each type can be characterized by specific traits. 2. Pass out index cards to all students. 3. Split students into small groups (3 – 4) and introduce the energy type scavenger hunt. a. The above table is an example that can be used to record findings. 4. Students should outside of the school and if possible a nearby street. a. Have students record the type of energy, where it was observed and the evidence they have to support their beliefs. i. For example if a child rides by on a bicycle there is evidence of chemical energy from the food they have eaten that day, the chemical energy is being converted into mechanical energy through the gears on the bicycle and then converted again to motion energy and the bicycle moves forward. b. Share findings back in classroom. What Happened? Students will understand that there are many different types of energy and the energy can be transferred between the different types. 21
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