Matter and Energy November 13, 2012 Ms. Smith Mrs. Malone DO NOW: Date: November 13, C demonstrate energy transformations such as how energy in a flashlight battery changes from chemical energy to electrical energy to light energy. 1.Pick up a new white Do Now sheet 2.Put your CB on your desk 3.Tape in this week’s vocabulary onto Pg. ___ in your CB 4.Copy down this week’s TEKS 5.Read the Do Now Reading 5. Q?: In paragraph 6, what is the meaning of the word ascended?

Page __ in comp book Divide your page into 4 quadrants Label the 4 quadrants like the example below: Quadrant 2:Quadrant 1: Quadrant 3:Quadrant 4: 4 Square Review

Write the question for each quadrant. Draw pictures to explain your answer. Color it! This is YOUR review, so complete it with quality! 2: Describe the energy transformations that occur in a flashlight. 1: describe the changes in KE and PE as a rollercoaster travels down the first hill. 3: Provide a real life example of KE continuously being changed to PE and back to KE again. 4. What is the relationship between height and PE and KE? 4 Square Review

Matter and Energy November , 2012 Ms. Smith Mrs. Malone DO NOW: Date: November 14-15, C demonstrate energy transformations such as how energy in a flashlight battery changes from chemical energy to electrical energy to light energy. 1.Put your CB on your desk 2.Read the Do Now Reading Q?: Based on what you have read, what would be another example of potential energy? A A ball resting in a basket B A ball spinning on a finger C A ball rolling on the ground D A ball flying through the air

Group Member Roles November , 2012 Ms. Smith Mrs. Malone : Green- Materials Manager Only person allowed out of seat during lab Obtains and returns all lab materials Red - Safety/Clean-up Manager Enforces all safety rules Yellow - Activity Director Reads directions to the group Keeps group on-task Blue - Data Manager Records all data Ensures all group members have lab data

Matter and Energy Block Day Ms. Smith Mrs. Malone : Question: Can citrus fruits be used as a weak battery because of their acidity?Hypothesis: A ___________ will generate a strong enough electrical current to power a light emitting diode (LED) because it has a __________ pH.Materials: 1.1 citrus fruit per group (lemon, lime, or orange) 2.microammeter 3.mini LED bulbs with 5 cm wire leads 4.galvanized zinc nails 5.copper roofing nails 6.alligator clips (2 per group) 7.electrical tape

Matter and Energy Block Day Ms. Smith Mrs. Malone : Procedures: 1. Set the fruit on a table and gently roll it around to soften it up. You want the juice to be flowing inside the fruit without breaking its skin. Do not break the skin! 2. Insert the zinc and copper nails into the fruit so that they are about 5 cm apart. You don't want them to be touching each other. Do not let the copper and zinc touch inside your fruit! Do not poke the zinc or copper through the other side of your fruit! 3. Wrap the negative lead (wire coming off of the LED bulb) around the zinc nail. The negative lead will be marked by a small flat spot on the circular base of the LED. Make sure you connect the correct lead to the negative terminal, or YOU WILL BURN OUT THE LED AND YOUR EXPERIMENT WILL NOT WORK! Use electrical tape to keep the wire from falling off the nail. 4. Wrap the other lead (the other wire coming off of the light bulb) around the copper nail. Use electrical tape to keep the wire from falling off the nail. 5. Your bulb should now be lit. 6. You will now use the microammeter to measure the current of your battery. Connect one of the microammeter's terminals to the copper nail with the alligator clip. 7. Connect the other terminal of the micro ammeter terminal to the zinc nail with the alligator clip. 8. Record the current of your fruit battery on the class data table.

Matter and Energy Block Day Ms. Smith Mrs. Malone : Data: Group Number Fruit pH of Fruit Voltage

Matter and Energy Block Day Ms. Smith Mrs. Malone : Data (continued) Title:______________________ Title:______________________ Y axis: _____________ X axis: __________________ X axis: __________________

Matter and Energy Block Day Ms. Smith Mrs. Malone : Conclusion ( answer in complete sentences): 1.Which type of fruit made the best battery? Back up your answer with data from the class data table. 2.Why did we use the microameter to measure the current of each fruit battery instead of just comparing the brightness of the bulbs to one another? 3.We used citrus fruits. Which chemical property do citrus fruits have that makes them ideal batteries? 4.What other fruits and vegetables might you try that would work as batteries? 5.How does pH (acidity) affect the fruit battery's strength? 6.Write a conclusion for this lab that summarizes your findings.

Matter and Energy November 16, 2012 Ms. Smith Mrs. Malone DO NOW: Date: November 14, Put your CB on your desk 2.Read the Do Now Reading 3.Place your Pink HW on your desk 4.Set-up two privacy folders Q?: What word in paragraph 10 means “to push something forward?” 6.9C demonstrate energy transformations such as how energy in a flashlight battery changes from chemical energy to electrical energy to light energy.

Matter and Energy November 9, 2012 Ms. Smith Mrs. Malone Top Ten Assignment 1.Pick an assignment from the front cover of your CB 2.Complete this assignment on Pg. ____ 3.Topic: Energy Transformations