grade 9 science – unit 4 – electricity #1 atom structure electric charges chargingelectric...
Post on 12-Jan-2016
222 Views
Preview:
TRANSCRIPT
Grade 9 Science – Unit 4 – Electricity #1
Atom Structure
Electric Charges
Charging Electric Discharge
More Charging
1 1 1 1 1
2 2 2 2 2
3 3 3 3 3
4 4 4 4 4
5 5 5 5 5
All matter is composed of it.
What are Atoms?
They are negatively charged and they are found in orbits
circling around the nucleus of the atom
What are Electrons?
These are found in the nucleus of the atom. Their
charges are either positive or no charge.
What are Protons and Neutrons?
An object with an equal number of protons and
electrons.
What is a Neutral Object?
These subatomic particles move in space AND they can
be added or removed from the atom?
What are Electrons?
An object with more electrons than protons
What is a Negatively-Charged Object?
It is what objects with like charges do
What is Repel?
The force exerted by an object with an electric charge
What is Electric Force?
Objects with like charges repel each other and objects with opposite charges attract
each other
What is the Law of Electric Charges?
An imbalance of electric charges on
the surface of an object
What is Static Electricity?
Two different neutral materials are rubbed together
so that electric charges are transferred
What is Charging by Friction?
A list of materials arranged in order of their tendency to
gain electrons
What isthe Electrostatic Series?
Charging a neutral object by bringing another charged object close to – but not
touching – the neutral object
What is Charging by Induction?
Connecting an object to a large body that is capable of removing an electric charge
from an object
What is Grounding?
Charging an object by contact with a charged object
What is Charging by Conduction?
A large hollow sphere resting on the insulting cylinder, and
inside the cylinder, a belt stretched over two pulleys.
What is a Van de Graaff Generator?
These are placed on the roofs of tall buildings to provide a
safe path for lightning to follow to reach the ground
while not damaging the buildings
What isa Lightning Rod?
An electric discharge that occurs between clouds OR
between clouds and the ground
What is Lightning?
Rapid transfer of electric charge from one object to
another object
What is Electric Discharge?
There are an excess number of these
particles at the bottom of a thunder cloud
What are negatively-charged
water particles?
A material that lets electrons move easily
through it
What is a Conductor?
What isCharging by Conduction?
What is Charging by Friction?
A shift in the position of electrons in a neutral
object that occurs when a charged object is brought
near it
What is Induced Charge Separation?
A material that does not easily allow for the
movement of electrons through it
What are Insulators?
top related