Choose any Teaching Idea from any of the Chemistry Simulations (http://phet.colorado.edu/en/simulations/category/chemistry ) and post your results/data and/or answers on your blog: Balloons & Static Electricity
Go to Google and search “PhET Simulations”. On the left side of the page, click on “Electricity, Magnets & Circuits.” On the right side of the page, scroll down to find the “Balloons & Static Electricity” simulation.
Lab Questions:
Answer questions #1-3!
1. Play with the simulation and observe what happens when the balloon is rubbed on the sweater. Explain why this happens. ___ The balloon becomes negatively charged and the sweater becomes positively charged. _________________________________
2. The process you completed in #1 is a called charging an object by friction. Bring your charged balloon near the wall and describe what happens to the wall. Explain why this happens. The balloon repels all of the positive charges of the wall when the balloon touches that section of the wall. This is because of polarization. ________________
3. The effect you observed in the wall in #2 is called polarization. Now, take your charged balloon and place it somewhere between the wall and the sweater. Observe what happens, and describe it here. Explain why this happens! _The balloon goes to the sweater because it is the most positive charged item. This is because the ballon wants to connect with the opposite (opposites attract)._______________________
Post-Lab Questions:
Write the letter of the correct answer on the blank provided.
_____ 1. When charging an object by friction,
a. only the positive charges move from one object to the other.
b. only the negative charges move from one object to the other.
c. both the positive and negative charges move from one object to the other.
d. neither the positive nor the negative charges move from one object to the other.
_____ 2. When an object becomes polarized,
a. only the positive charges move within the object.
b. only the negative charges move within the object.
c. both the positive and negative charges move within the object.
d. neither the positive nor the negative charges move within the object.
_____ 3. Based upon what you saw in this lab, then, it can be said that
a. positive charges are stationary within objects.
b. negative charges are stationary within objects.
c. positive charges are mobile within objects.
d. negative charges are mobile within objects.
e. both a and b
f. both a and d
g. both b and c
h. both c and d
John Travoltage
Go to Google and search “PhET Simulations”. On the left side of the page, click on “Electricity, Magnets & Circuits.” On the right side of the page, scroll down to find the “John Travoltage” simulation.
Lab Questions:
Answer questions #1-3
1. Rub John Travoltage’s foot on the carpet and observe what happens. What is this called? _His body becomes positively charged. This is called friction and I saw it in the balloon activity. When the foot is rubbed the positive charges are transferred to his body from the carpet. _______________________________________________________________________
2. Watch after you stopped rubbing John Travoltage’s foot on the carpet, what happened to the charges in his body? They stopped moving and spread out.____ Were the charges in his body positive or negative? __It is a negative charge.____ Explain why the charges do what they did. _When the leg is moving the charges are gaining power or energy and when the leg stops the power supply stops and they stand still.
3. Now, touch John Travoltage’s hand to the door knob. Observe what happens. Explain why this happens. The negative charges are released from his body as a shock wave because they are connecting to a positivly charged object (opposites attract again.) ____________________________ _______________________________________________________________________ _______________________________________________________________________
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,
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. neither the positive nor the negative charges move to the conductor and exit the object.
_____ 3. Based upon what you saw in this lab, then, it can be said that
a. a person cannot be shocked if they have an excess charge on them.
b. a person cannot be shocked if they have neutral charge.
c. a person can be shocked at any time because it doesn’t depend on the charge the person has.
Part 2: Work with any of the Chemistry Simulations to create your own Teaching Idea.
MY TEACHING IDEA:
1. Go to the Building a Molecule simulation: phet.colorado.edu/en/simulations/build-a-molecule
2. Complete the first 5 levels of the simulation.
3. Draw the molecule for:
| PH3 |  |
| CH4 |  |
| 2N2 |  |
| N2O |  |
| Ammonia |  |
| Hydrogen Sulfate |  |
| Phosphine | |
5. Name three examples of a molecule’s name. ____Methane, Hydrogen, Oxygen_____________________________
6. Write the name of the Molecule and its chemical formula.
| Piture | Chemical formula | Name of molecule |
 | CO2 | Carbon Dioxide |
| | NH3 | Ammonia |
| | N2 | Nitrogen |
 | BH3 | Borane |
| | CH4 | Methane |
 | SO2 | Sulfur Dioxide |
6. Can the 2 Nitrogens be on either side of the Oxygen in N2O? __No it cannot be on either side because it will change the molecule into something else. _______
7. Are these two the same Molecule?
a. Yes
b. No
8. What has changed to make Hydrogen (H2) into Water (H2O)? ___It added an Oxygen atom to its genetic make up. ___________________
*3 Teaching standards for 4th graders:
A.4.1 When conducting science investigations, ask and answer questions that will help decide the general areas of science being addressed.
A.4.5 When studying a science-related problem, decide what changes over time are occurring or have occurred.
B.4.1 Use encyclopedias, source books, texts, computers, teachers, parents, other adults, journals, popular press, and various other sources, to help answer science-related questions and plan investigations.
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