Activity 1. Visual Thinking Approach: Types of Charging Directions. Decide what type of charging is depicted on each of the given illustrations by writing your answer on the space provided. 1. After being rubbed, a plastic ruler can attract paper scraps. 2. Charging a balloon through friction and place the balloon near pieces of paper. 3. You are touching a charged piece of metal with a negatively charged glass rod. ______________________ ______________________ _____________________ Processing Questions: 1. What are the types of charging? _________________________________________ 2. Based on the pictures above, describe each type of charging. __________________.
Activity 1. Visual Thinking Approach: Types of Charging
Directions. Decide what type of charging is depicted on each of the given illustrations by writing your answer on the space provided.
1. After being rubbed, a
plastic ruler can attract
paper scraps.
2. Charging a balloon
through friction and
place the balloon near
pieces of paper.
3. You are touching a
charged piece of metal
with a negatively
charged glass rod.
______________________ ______________________ _____________________
Processing Questions:
1. What are the types of charging? _________________________________________
2. Based on the pictures above, describe each type of charging. __________________.
Activity 2. Charging objects by friction
Objectives: Explain the role of electron transfer in electrostatic charging by rubbing.
Materials: tissue paper, a human hair, balloons, silk, plastic ruler, glass rod, copper
Procedures:
1. Cut the tissue paper into tiny bits.
2. Rub the balloon across a human hair. Move the balloon near the tiny bits of tissue
paper. (Optional: Rub the other balloon across human hair and move it closer to the
other rubbed balloon.)
3. Repeat procedure number 2 in a glass rod, plastic ruler, and copper after rubbing with a piece of silk.
Observation After Rubbing
1.) Balloon-___________
2.) Glass Rod-__________
3.) Plastic Ruler-__________
4.) Copper-____________
Processing Questions:
1. What can you predict about the polarities of charges? Why?
2. What happens when you move the two balloons near each other after rubbing?
3. What is the role of electron transfer in electrostatic charging by rubbing?
Activity 3. Charging Objects by Induction
Objectives: Perform the balloon-cans experiment to show electrostatic charging by induction.
Materials: 2 pieces cola cans, plastic cups, glue stick, 2 pieces balloons
Procedures:
1. Using a glue stick, mount the 2 cola cans at the top of a plastic cups.
2. Place the ends of two cans together and a negatively charged balloon (having been
rubbed with human hair) is brought near to one end of the cans. See the diagram
below.
Processing Questions:
1. What happens when the two cans are moved closer together? What happens when they
are separated?
2. What is the role of the balloon during the induction process?
3. Based on the experiment, describe the electrostatic charging by induction.
Please also answer all the processing questions thank you!
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