Exploring electric charges simulations answer key

Static Electricity virtual lab
Subject
Science

Question Description
I will include a link below to the virtual lab, as well as a file with the questions that pertain to the virtual lab, please complete the lab and answer all the questions that go with it.Name: Class: Date: Exploring electric charges – simulations Purpose: Hypothesis: Warm-up: Fill in the table with the descriptions of each particle. Electron Proton Neutron Relative size/ Charge Can it move? Procedures: Click on the Virtual Lab Balloons and Static Electricity Part 1: Balloons 1. Using the picture on the right, draw the charges that you see when you open the simulation. Then fill in the table. To get overall charge, subtract # of negative charges form # of positive charges. Charges of Balloon and Sweater before moving Balloon # of positive charges # of negative charges Overall Charge Created by Matt Simkins, 2017 For PHET Interactive Simulations Sweater 2. Click on the balloon and drag to rub the balloon against the sweater, then record your new results in the table to the left. Charges of Balloon and Sweater AFTER moving Balloon Sweater # of positive charges # of negative charges Overall Charge 3. When I rub the balloon against the sweater, what happens? Fill in the table below The charges that can move are the Rubbing the balloon against the sweater does what to the electrons of the sweater? Is the balloon material an insulator or a conductor? Of what kinds of charge does the balloon have extra? What, therefore, is the charge of the balloon? Of what kinds of charge is the sweater lacking? What, therefore, is the charge of the sweater? 4. Click and drag the balloon to the center of the screen, then release the mouse. What happens? Explain why in terms of charges. 5. Notice the wall on the right side of the screen? There are 54 positive charges and 54 negative charges in the wall. What is the overall charge of the wall? ____________________ 6. Make a hypothesis: What do you think will happen if you bring the balloon with all those negative charges over to the neutral wall? Circle one choice from below: Attract Created by Matt Simkins, 2017 For PHET Interactive Simulations Repel Nothing 7. Make an observation: Click on the balloon and slowly drag it towards the wall. What happens as it gets closer to the wall? Can electrons move? Can protons move? What do like charges do? What do the electrons in the wall do when the balloon comes closer? Why? 8. Draw what the charges in the wall do when the balloon comes closer to the wall. This process of separating charges temporarily is call polarization. Polarization is how a charged object can be attracted to a neutral one. Created by Matt Simkins, 2017 For PHET Interactive Simulations Wall Part 2: John Travoltage Click on Virtual Lab John Travolatage 1. Predict what will happen to John if he rubs his foot against the carpet. 2. Rub John’s foot on the carpet by clicking and dragging his foot few times. What happens? (Explain in terms of electrons) 3. After rubbing John’s foot on the carpet, click and drag John’s hand such that it touched the doorknob. What happened? (be specific) 4. How is this simulation different from the balloon and sweater or balloon and wall touching each other? What we find in this activity is that when an excess of charges build up, they want to go back to a balanced, or neutral state. When an excess of charge is “dumped” into a conductor, we see a spark or a shock. The doorknob in this activity is referred to as a ground. A ground is a place where we can dump excess charge. Post-Lab Questions: Write the letter of the correct answer on the blank provided. _____ 1. Over time, all the negative charges in an object, a. remain clustered together where they were placed. b. spread out over a small area on the object. c. spread out over a large area on the object. _____ 2. When a charged object touches a conductor (like a door knob), a. the positive charges move to the conductor and exit the object. b. the negative charges move to the conductor and exit the object. c. both the positive and negative charges move to the conductor and exit the object. d.