Electric Forces
What all matter is made of
Small Particles
What does ATTRACT mean?
PULL TOWARD
What is magnetism?
A force that pulls objects that contain IRON or STEEL
What is a magnetic POLE?
The point where the magnetic force is the STRONGEST
Two types of electric charges
1. Positive
2. Negative
What does REPEL mean?
PUSH AWAY
What is a natural magnet
NOT MADE magnetic by PEOPLE
What are the two poles?
1. North
2. South
What is a positive charge?
MORE POSITIVE particles than negative
What do LIKE charges do?
REPEL / PUSH AWAY
Kinds of objects magnets DO attract
What is a magnetic field?
The space where the force of a magnet acts. You cannot see the field but you can observe its effects
What is a negative electric charge?
MORE NEGATIVE than positive particles
What do OPPOSITE charges do?
ATTRACT / PULL TOWARD
Kinds of objects magnets DO NOT attract
What do we know about the force of a magnetic field?
It can be STRONG or WEAK
What does it mean when an object is NEUTRAL?
NO CHARGE
(Same number of Positive and Negative particles)
What is a source?
The CAUSE of the force (where it came from)
What are permanent magnets?
Magnets that CANNOT be turned on and off
What do LIKE poles do?
REPEL / PUSH AWAY
(North, North OR South, South)
Part 1: What is an INSULATOR?
Part 2: Give examples of insulators
Electric charges DO NOT move easily through insulators.
Examples of insulators are RUBBER and PLASTIC.
What 2 things determine the STRENGTH of an electric force?
1. the AMOUNT of ELECTRIC CHARGE the objects have
2. the DISTANCE between the objects
What is an electromagnet?
An electromagnet is a piece of metal with a wire wrapped around it. When an electric current goes through the wire, the METAL BECOMES A MAGNET.
ATTRACT
(North, South)
Part 1: What are conductors?
Part 2: Give example of a conductor.
Electric charges MOVE EASILY through conductors.
Examples of conductors are METALS.
How is an electromagnet different from a permanent magnet?
An electromagnet CAN be turned on and off by an electric current.
How do you know Earth is a gigantic magnet?
1. It has a NORTH and SOUTH pole
2. Iron center
Part 1: What is STATIC DISCHARGE?
Part 2: Give 2 examples of static discharge
The TRANSFER OF PARTICLES between objects that aren't touching.
Examples of static discharge are 1. LIGHTNING STRIKES and 2. SPARK / ZAP
Compass has a MAGNETIC NEEDLE that always points north and can help us find our way
In our science lab, we tested whether or not a magnet could pick up steel beads through different materials. What was the result of the experiment? (Name at least 3)
The magnet attracted the steel beads through
1. CLOTH
2. TISSUE
3. PAPER
4. CARDBOARD
5. WATER