U1C2A3Record Sheet

What are the defining characteristics of an electric-charge interaction?

What are some of the similarities and differences between the magnetic and electric-charge interactions?

`Sweater, Balloon and Wall Simulation…

What are the defining characteristics of an electric-charge interaction?

What are some of the similarities and differences between the magnetic and electric-charge interactions?

Balloon Demo

Play iMovie – clips 6 & 7

attract attract

Charged objects attract uncharged objects. The charged object (balloon) is attracted to uncharged nonmetallic AND metallic objects.

electric-charge movie

repel attract

repel attract

attract repel

attract repel

SAMESAME

repel attract

repel attract

attract repel

attract repel

SAMESAME

repel attract

repel attract

attract repel

attract repel

SAMESAME

repel attract

repel attract

attract repel

attract repel

SAMESAME

They repel. Likes repel!

They attract. Opposites attract!

The interaction will be the same. I observed that the tape showed the same change in motion (attract or repel) with the sticky side and non-sticky side. When one of the pieces of tape was flipped, I observed the same interaction (flipping or turning does not matter).

Characteristics of an electric-charge interaction

In Exploration #1:

1. When a charged object is brought near an uncharged object (metal or nonmetal) they attract (both sides).

Characteristics of an electric-charge interaction

In Exploration #2:

2. Opposite charges (+,-) attract (on both Opposite charges (+,-) attract (on both sides of the tape) sides of the tape)

ANDAND

Like charges (+,+) (-,-) repel (on both Like charges (+,+) (-,-) repel (on both sides of the tape)sides of the tape)

Similarities1. Opposites attract and likes repel

(+,-) (N,S) attract(+,+)(-,-)(N,N)(S,S) repel

2. Magnet to Magnetic material interaction - always attracts (both sides)

Charged object to Uncharged object interaction- always attracts (both sides)

3. Objects must be near each other to interact, but do NOT have to touch

List the differences:List the differences:

Differences

1. Electric charge must be created by rubbing or friction (sweater and balloon). Magnets do not need to be charged.

2. Magnet to Magnet interaction- if both magnets attract and you flip 1 magnet, then they will repel.Electric Charge Interaction- if one side attracts, flip one object, still attracts.

3. Magnets only interact with magnetic materials (nickel, iron or cobalt) or other magnets, whereas charged objects (balloon) interact with metals AND nonmetals (aluminum foil and paper).