Download Bell Ringers

Bell Ringer
60sec
Oct 22, 2013
Label the energy transformations to a
Radiometer
http://www.duke-energy.com/about-energy/generating-electricity/coal-fired-how.asp
Chemical Thermal Mechanical Electrical Thermal Radiant
PE
KE
KE
KE
KE
KE
Coal boiler
Thermal
convection
turbine spins electricity conducts light shines Radiometer
heats and spins the
meter
Steam
Generator that boost electrons to conduct
(rotating magnets)
Label Energy Transformations to make the clock light up.
Make an Energy transformation chart for the robot’s eyes.
Read and answer questions on 17.1! Check #1-23
Target I can define types of static electricity.
Bell Ringer Define and draw each type of atom.
Stable (no charge) atom
Positive
Charged atom
More +
Protons
Draw
Negative
Charged atom
More – electrons
Draw
Agenda
1. Electrical Charge and force (17.1Holt Power Point)
2. Van de Graaff Generator- static charge demonstrations
3. Attract or repel water with a charge balloon.
Diagram the Van de Graaff and explain why when you get
close you get shocked even when you don’t touch it.
Targets
I can define static electricity.
Agenda
1. Bell Ringer
1. Bell Ringer Answer: A neutral or stable atom has
the same # of protons, neutrons and electrons,
Van de Graaff Generator – generates + ionic charges (atoms
that lost an electron so has more protons than electrons)
They want to find an electron to complete their
outer shell. In a quest to find a balanced “Entropy” and to
complete the valence (outer) orbit it jumps to your extra (-)
electrons
There is an electron!
NO MORE CHARGE!
Jump
60 seconds think of 10
things your thankful for
Bell Ringer Write the sentence below and complete the
blanks then touch briefly the plasma ball.
All Energy moves from Stored _______
PE to _____ PE
and hot chases ____. Atoms try to take the least
resistance path toward a balanced to a no charged state.
I cant find my electron!
Plasma Ball and Van de Graaff –demos
2. How does lightning strike? Read diagram
how and watch a video on Discover Education
Bell Ringer
60sec
Bell Ringer
Target: I can describe and predict the electrostatic forces
between objects using the Coulombs Law formula
Agenda
1. Read about Brains axons and electrical connections – 2
articles and record answers in CB.
2. Test different solution to see which conducts
electricity better.
2. Chapter 17.2 What is current and how does if flow?
Label pictures on target sheet and add to your notes
from last night!!!!
4. Virtual Lab- electricity moving electron in
a circuit. Examples:Wire, water, metal, chemicals, you, air
R-(hum tingles lips to remind you the resistance is friction and slows the flow cost dough))
(Ch17.3)
V=IR
PE.
Series
verses
parallel circuits
Parellel cicuit have their own supply of PE so both Series share
lights work independently and shine bright.
1st bulb gets all it wants and the 2nd could be dimmer since it gets left over PE
Very Important People have Power !
Hand motions.
VI=P Watts up with the Electric Bill?
Kw/hour used x co$t for 1 kw/h = your bill
Bell Ringer
60sec
Oct. 24, 25
Target:
I can design an experiment to give evidence
that an electrical current makes a magnetic
field.
Agenda:
1. Build an electromagnet- contest
Who can pick up the most paper clips?
2. Bring in stuff to build your own EM “thingy”
Bell Ringer
60sec
Oct. 28
Review for test:
Electricity and Magnetism Relationships :
Add to your copy with me on the overhead as the story unfolds…
Atom – has 3 Protons , 3 Neutrons surrounded by it’s
strong nuclear force
electrons are held in orbit toward the Protons by the
Electromagnetic force!
Gravity like cupid is constantly forcing
all masses toward one another
Help, they call me a + ion but some atom took my outer shell’s electron!
“Electrical Force Field activated”
Force to protect my electrons.
Repel atoms like me, looking for electrons.
Thanks,
I’m all charged with
extra negative
electrons now!
Static Attraction
1.How is Static electricity
formed?____________________________________________________________
_______________________________________________________
2.Why is a battery a source of energy? It does not supply the charge instead
___________________________________________________________
3.Which battery is Best to buy and why?_______________________
4.How are series and parallel circuits different?______________
____________________________________________________________
Draw a schematic diagram a
series circuit:
Spinning magnets
that generate electricity by
creating an alternating force
field that produce moving
electrons along a conductor
it is
called a Generator.
Transforms mechanical energy
into ___________ __________.
5.Where did the generator get it’s
Parallel circuit
Coiled wire with Amps
can induce a magnetic force
field (lines the metal’s atoms
into a North and South pole);
the coil is attach to a shaft
and does work this is an
Electrical Motor
Converts electrical energy
into _____________ _______.
What source of energy be used?
energy to rotate?_________
6. Diagram how a generator
produces an electrical current:
__________ or_____
Diagram how electrical current
can produce a magnetic field:
7. What do Generators and electrical motors have in common?
_____________________________________________________________
8. Who discovered that a coiled wire with electricity would induce a magnet and
that changing magnetic fields across wire perpendicularly can produce
electricity? _____________ ______________
The Laws of conservation are all about transform/recycle/reuse.
9. Why do think our universe conserves matter, energy and
momentum?______________________________________________
10. How do we get charge for our electrical uses?
Formula:
Units:
Process:
Just remember:
1. Electricity and magnetism are two aspects of
a single “electromagnetic force” (look back at Atom)
2. Moving electrical charges produce magnetic forces or “fields” and
moving magnets produce electric forces or “fields”
3. Electrical force is universal opposites attract & like charges repel
but gravity is always attracting the masses
Mechanically
Electrically
Work =force x distance
= Newton Meter
= ____joules
Ohms Law: Volts = IR
Power = work/time
=
w/s
= _____watts
Volts= Amps Resistance
ion current inter friction
Power = volts Ampere
push ions in a current
P= V
I
# Kilowatt/hours x cost of electricity /kwh = electric bill
you use a month
2. Present EM toy things
3. Electromagnetic Exam (after lunch)
Bell Ringer
60sec
Oct. 30
Bell Ringer – diagram the thermal windmills
electromagnetic fields hitting perpendicular
(90degree) to the permanent magnets fields
causing them to force the fan to move. Hot
chase cold! Thermal conduction caused the
atoms to increase in KE.
Agenda:
1. Several more EM demos
2. Electroplating copper off a penny on to a dime
3. Video of electromagnets, Earth’s changing
magnetic poles , how a TV works by transfers of
EMR’s and electrical conduction to our TV
(Discovery edu)
4. Got EM Test back
5. New Wave Targets and Re-Test practices
Take 60 sec
Breath -take deep breaths!!!!
Bell Ringer- Prediction
Look at a full water bottle with nails in it, of what happen when the nail is removed?
EM Target-1 ,2 and 3
Agenda:
1. Record HW: research Electromagnets and reach chapter 18
2. Power Point on 17.2 Circuits and PE flow of current 3. Virtual lab circuits
and calculation of power and resistance.
Electrolysis and conduction in solutions (like your brain). Demo
Lite up a florescent bulb with a Van de Graaff Fenerator! Fun and Shocking
HOMEWORK!
Write down! Bring in material to make
Electromagnets do a task!
Take notes onCh18!
Friday Oct. 25
Bell ringer
Copy at least 5 things from the list shown;
they are uses of permanent Magnet in our
daily lives. I will be checking ch18 & items
brought in for today’s EM lab
Agenda:
1. Permanent magnets verses electromagnets
2. Read how to build a good electromagnet and motor in
Chapter 10 of CPO book.
3. Build Electromagnets- see samples you can make: door
bell, dancing doll and rotating megaton.
Celebration !!! M&M cookie brownie Highest class GPA and
Great attendance for the 1st 9 weeks and Mastery of Targets
(see list)
Monday
Static Man review
Share electromagnets