Electric Charges
An atom with one more electron than protons has what type of charge?
Negative
Materials that allow charges to move through freely. Give the general name for this type of material, not an example.
Conductors
What type of magnetic force exists between 2 North poles of a magnet when brough together?
Repulsion or push apart
The area surrounding a magnet where magnetic forces can be detected is called what?
Magnetic Field
Non-Contact
An atom with one less electron than protons has what type of charge?
Positive
Materials charges cannot move through freely. Give the general name for this type of material, not an example.
Insulators
Opposite, or North/South
As two magnetic poles approach each other, the strength of the force between them ____________.
Increases
What type of poles would you expect to be under the paper based on the field shown by the iron filings
North/North or South/South
What type of charge does an atom have if it has an equal number of protons and electrons?
Neutral
The extra charge that builds up on an object until it moves elsewhere is known as what type of electricity?
Static
If you take a bar magnet and cut it in half, then cut those bar magnets each in half, how many south poles will exist between all the pieces?
Four
If the north pole of a magnet points to what we call the north pole of the Earth, in reality that means what magnetic pole of the Earth's magnetic field is located near the north pole?
South Pole
A balloon is rubbed with a wool cloth to give it a static charge. The balloon is then placed against a wall which it sticks to. What is the overall charge of the balloon and what was the overall charge of the wall
Balloon - Negative
Wall - Neutral
The name for an atom with a positive or negative charge.
Ion
When built up charges leave an object it is known as electric ______________.
Discharge
Groups of atoms in materials that form areas like tiny magnets are known as what? These need to be lined up for a material to act as a magnet.
Magnetic Domains
Earth's magnetic field draws in charged particles from the Sun towards its poles. When they hit the atmosphere they can be seen in certain parts of the Earth. What are these known as?
Auroras or Northern Lights
What property affects the strength of the gravity, magnetic and electrostatic forces?
Distance
Name 3 factors that determine the affect that two charged objects will have on each other.
Distance, Amount of Charge and Types of Charge
What are 3 ways discussed in the chapter that describe how objects can become electrically charged?
Friction, Contact and Induction
A material that can turned into a magnet is called what?
Hint: the atomic symbol for Iron; Fe, can give you a little hint.
Ferromagnetic
What generates the Earth's magnetic Field
Chharged particles in the Earth's outer core rotating around the solid iron inner core.
An iron needle has been given a positive charge.
Which type(s) of fields will exert a force on the needle?
Electric, Magnetic and Gravitational