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PICK UP: Papers
TURN IN: -
DO NOW: Find a partner
and begin Experiment 1 on
your paper. See Kelly for a
balloon. Timer is running!
HW: Start U7 Vocab cards
Next Test: Quiz on 3/9
Exam 7 on 3/28
Why it matters in LIFE:
Part of being a
functional human
being is being able to
understand what’s
happening in the world
around you!
Why it matters in THIS CLASS: Our Goal = 80%
Mastering today’s lesson (focused
participation, asking questions, etc)
is the first brick that will help us
reach our goal for this unit, and
eventually for the year
By the end of today, IWBAT…
• Understand Electrostatics
•Differentiate between
conductors and insulators
TEKS:
5(C) describe and calculate
how the magnitude of the
electrical force between two
objects depends on their
charges and the distance
between them
Topic:
Electrostatics
By the end of today, IWBAT…
•calculate electric force
between two point charges
using Coulomb’s law
WHAT IT MIGHT LOOK LIKE ON A TEST:
https://www.youtube.com/
watch?v=3FpjcOWwiI4
ATOMS
These are usually
balanced, making
the overall atom
neutral.
Atoms are made up of protons (+), neutrons
(neutral), and electrons (-)
ELECTRON’S CHARGE, e-
(Units of Coulombs (C))
e- = 1.6 x 10 -19 C
A lightning strike has
about 20 -30
Coulombs of charge!
WHAT IT MIGHT LOOK LIKE ON A TEST:
But what happens
if they become
unbalanced?
aka: excess or shortage of e-
Caused by a tiny charge imbalance
resulting in net positive or
negative charge on an object.
STATIC ELECTRICITY
INSULATORS VS. CONDUCTORSInsulators (non-conductors) Conductors
Charges are stuck where you put them Charges are able to move freely &
spread out
Ex: wood, rubber, glass Ex: metals, water, human body
*Semi-conductors are
somewhere in between*
Explain the difference between conductors and
insulators when it comes to how they handle
charges.
EXIT TICKET (DOL)