Electricity and magnetism are part of a single force that has many useful applications such as conversion to heat, motion, and sound. Big Idea
Guiding Questions How do we know an object has static electricity? In what ways are magnets similar to electrically charged objects?
The park ranger again was amazed to know how much you learned about the relationship of electricity and magnets. He mentioned if we could look into something funny that happened to him the other day. He said he was pack up some things at the camp and was pushing around some plastic bags that were on the floor. When he lifted one of them he noticed several pieces of paper attached to the bag and to a plastic apron he had on. He checked for a magnet inside the bag, and found none, he did not find any source (D-cell) or wire inside either. The pieces of paper were clinging to the bag and his apron until he took them off and they made a crackling sound. He would like to know more why this happened and how it relates to magnets and electricity. We will have to investigate with some plastics he sent us. What is the problem that needs to be investigated here?
What did the park ranger notice about the plastics? What was the ranger doing with the plastic? What did the ranger check for inside the bag? Think and talk about…
Write a question in your notebook that is related to the scenario and can be investigated. Your question should be correctly written; capital letter and ending punctuation. Your question should not be able to be answered with a yes or no. You do not need to have the same question as your group. Focus Question
Class Focus Question How does a plastic bag attract paper?
Prediction If think if we_______________________________________________________then _____________________________________________________________________ because______________________________________________________________ Be prepared to share your thinking. As people share, decide if you agree or disagree with their thinking and why.
How will you record your observations? • What materials are you testing? • What are you going to observe when you test the plastic and the paper? • How many times do you want to test the materials to be sure of your result?
Read and discuss pages 10-11. Make sure you are focused on understanding negatively charged objects and positively charged objects. Think about previous experiences you’ve had with static electricity. Additional Resources: http://www.school-for-champions.com/science/magnetism.htm
Making Meaning Conference • What does the data tell us about how static electricity works? • Let’s analyze the similarities between static electricity and magnets. • What claim can we make about plastics and paper?
Claims and Evidence I claim that… I know that…. I claim this because… I know this because….
Claims and evidence statements using the guiding questions How do we know an object has static electricity? In what ways are magnets similar to electrically charged objects? Example for #1 I claim we know if an object has static electricity if ___________________________ _________________________. I know this because __________________________ _____________________________________________________________________.
Conclusion My thinking has changed since I made my original prediction. I used to think ________________________________________________________, but now I know _______________________________________________________ ____________________________________________________________________. Today I learned__________________________________________ Reflection I wonder what would happen if… I’d like to know more about…