Electricity Magnetism Unit

Integrated Science 2014

Two Incentive Plans: Daily/Weekly Daily- ON TIME & IN CLASS ENTIRE PERIOD-

(daily drawing) Weekly- AVERAGE DAILY EFFORT SHEETS

EACH WEEK- SCORE IS QUIZ GRADE (weekly highest score prize)

Welcome Academic IS

Fear of Beginning Should Be Dispatched (Hartford Courant 1-3-14)

Small Wish vs. Big Wish My Small Wish My Big Wish

Welcome Academic IS (cont’d)

Rules- On time/prepared/ready to learn Fear of Beginning Should Be Dispatched

(Hartford Courant 1-3-14) Small Wish vs. Big Wish My Small Wish My Big Wish

Welcome Honors IS

Take the pretest- Let’s see what you remember!

Electricity Pretest

Electromagnetic Gravity Strong Force Weak Force

Forces are not transmitted directly between objects, but instead are described by interactions in force fields.

Each force has an “exchange particle.”

What are the 4 Known Forces?

Interaction of particles with an electrical charge.

For a long time, the electric and magnetic forces were considered to be different forces, but they were finally unified by James Clerk Maxwell in 1864.

Electromagnetism is perhaps the most obvious prevalent force in our world, as it can affect things at a reasonable distance and with a fair amount of force…can attract & repel.

The photon is the exchange particle for this force.

Electromagnetic

Furthest reach, but it's the weakest in actual magnitude.

a long-range attractive force that acts on all particles.

Exchange particle has been named the graviton.

Gravity

Keeps nucleons (protons & neutrons) bound together.

Force is at the subatomic level. The strongest force of all known forces. Holds quarks together to form neutrons and

protons, and holds neutrons and protons together to form nuclei.

The exchange particle is the gluon.

Strong Force

The weak interaction is a very powerful force that acts on the scale of the atomic nucleus.

It causes radioactive decay and explains nuclear fusion reactions in stars.

A repulsive short-range force. Exchange particle is the boson (W & Z) and

these particles were only confirmed in 1983!

Weak Force

Modern unified field theory attempts to bring these four interactions together into a single framework.

Electromagnetism, Strong & Weak forces have been unified.

Gravity is not, but physicists are working on that…

Unification of Forces

Has to do with electric charge. Electric charge creates electromagnetic

fields that interact. Studied since ancient times, but only in

modern time that we have been able to put it to practical use.

Plenty of examples of well known effects: lightning, static, electric current…

What is electricity?

Charged objects exert a force and within the structure of an atom are different charges that exert forces.

Clip 1- 2 min Overview of Structure of an atom http://www.youtube.com/watch?v=lP57gEWcisY

Clip 2 –7 min44s The atom, quarks, and elements http://www.youtube.com/watch?v=Vi91qyjuknM

So what does the atom have to do with electricity?

Invented in 1928 MIT Professor Patented in 1931 Electric induction

Van de Graff Generator