Physical Science Unit 9 Class Notes
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Page 5.
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#1
Electric charge is an electric property of manner that describes the charges of an object.
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#2
Paper and wall will have the opposite charge, scotch tape and water will have the same charge.
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#3Positive charge will be attracted to negative charge.
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#4Water molecules will adjust to match positive with negative.
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Pg. 6
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#1Conductor allows electric charges to move freely and a insulator does not.
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#2
In the diagram with the penny you would draw positive charges closer to the balloon. In the one with the
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mirror you would draw evenly displaced negative charges.
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#3Induced charges are charges that are made with the rearrangment of ions.
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Pg. 7
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#4The attraction or repelling motion would be an indicator.
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#5The balloon would transfer its electrons.
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#6As the balloon became negatively charged the wool became positively charged.
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#7N/A
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#8N/A
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Pg. 8Took care of this experiment on 3-27-2018
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Pg. 9
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#9
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a. Neutral objects get charged via the transfer of electrons
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b. Your hand will become more positively charged.
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#10
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A.Balloon would become charged via the friction of the wool.
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Pg. 10
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#1
Student answers may vary. Discuss what you have seen / what we have talked about.
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#2Static electricity may be the culprit, but it may not be the phone doing it.
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#3
You could develop a charge from the friction generated by you getting in and out of the car.
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#4Person will lose the charge by touching the metal since metal LOVES electrons
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Pg. 11
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#1Water particles that are rubbing against each other charge the cloud.
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#2Negative is attracted to positive
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#3
The positive charge from the ground meets the negative charge from the bottom of the cloud.
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#4Cloud to cloud and cloud to ground
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#5
Positive charges leave the ground and meet the negative charges quickly, which superheats the air and creates a bright light
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Pg. 12
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#1Circle the key pieces in the experiment
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#2Remember that the bolt of lightening is coming from the group up.
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#3
The key was charged, the electrons jumped to his positively charged hand, if he had been holding the key, he would have received the full brunt of the electrons.
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#4
It was noted that lighting can be charged over a conductor and into the ground in a controlled set up.
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Pg. 13
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#5
The lightening rod needs to be at the highest point in order to break the insulator that is the air.
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#6
If the wire was made of rubber then the full blast would be absorbed by the object, thus setting it on fire.
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#7When you touch a doornob.
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Pg. 15
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#1Like charges repel each other, opposites attract
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#2Static electricity refers to electricity that rests on an object.
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#3
When an object is charged via induction the amount of charges in the object remains the same, but when charged by contact electrons transferred cause an imbalance.
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#4
Polarization indicates the arrangement of particles where one side is slightly more positive or negative. This happens when the neutral object is induced.
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#5-1.6 x 10^ -16
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#6-3.2 x 10 ^-16
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Pg. 16
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#1
Lightning is the physical appearance of electrons leaving Earth and entering clouds.
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#2
The electrons are traveling faster than the sound barrier resulting in the "booming noise"
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#3Sound is created due to the vibration in the medium (air)
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#4
Conductors would have electrocuted him, insulators will keep in alive. Rubber string is a decent replacement.
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Pg. 17
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#5Draw a picture of a lightning rod attached to a house in the box. Yep, really.
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#6
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a.Rod - attracts the lightning
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b. Wire - Made up of conductors to create a guiding path
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d.Ground - used to release the energy safely
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Pg. 31
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#1Bird #1 - It is at the highest point
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#2As the person throws the ball additional energy is built up.
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#3Work is done when the objects moves over distance. So..... yes.
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#32
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#1Like charges will repel, opposites will attract
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#2
It has a higher Pe when it is closer to another positive charge because of the greater amount of work is needed to place like charges nearby.
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#3It would change in the fact that opposite charges attract.
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#4The two charges would have 24 joules.
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Pg. 37
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#1The Zinc loses electrons which are gained by the solution through reduction.
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#2
The electric charges would not flow because the same charges will repel each other.
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#3
It is important to place the battery on the correct side bcause if the wrong type of charges were connected then the electric charges would not flow.
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#4Could pour salt water over the battery to help with the electric charge.
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Pg. 38
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#1
Make sure the diagram shows arrows going from the bottom of the battery to the top.
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#2The penny battery uses direct current becauase it has only one way to travel.
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#3Check the link, your answers will vary.
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Pg. 34
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#1Draw a pic of what your group created
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#2Write "No light" for all 4 boxes
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Pg. 35
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#1Nickel and penny work as positive and negative ends of the battery
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#2
Each color operates on a different frequency, voltage will allow only some LEDs to light
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#3It lights!
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#4Each layer would contain 2.0 / 5 = 0.4v
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Pg. 36
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#1Label the diagram further
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#2
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A.Terminal - refers to the two ends of the battery
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b. Electrolyte is a solution that conducts electricity
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C.Electrodes are two different conducting materials (Penny/ Nickel)
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#3Two electrods, electrolyte, and two terminals
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Pg. 78
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#1
Lightning occurs due to the static electricity that has been built up in the cloud due to friction in the particles. Thunder can be heard because the sudden exchange of electrons breaks the sound barrier.
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#2
His experiment proved lightning can be diverted. The ligthning rod redirects electrons into the ground
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#3
Grounding indicates the redirecting of electricity. Grounding can be done using Earth or large surfaces.
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#4
Polarization refers to the rearrangement of c harges where one side is more positive or negative than the others
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#5
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