Static Electricity
Name the 3 parts of an atom and their charges
Proton-positive; Neutron-neutral; Electron-negative
The battery used in a simple circuit is called the ______.
Power source
Give an example of naturally occurring electricity and an example of man-made electricity
Naturally occurring: lightning, static electricity
Man-Made: city, house lights
Like charges (same charges) ___________ and unlike (opposite charges) ________ when put together.
repel; attract
True or False:
An electromagnet is only a magnet when an electric current is running through it.
True
Which of the 3 particles that make up an atom can easily move from one atom to another?
Electrons--outside the nucleus; protons & neutrons hold tightly to each other
What are the 4 parts required in a simple circuit (to light a lightbulb).
Battery, 2 wires, lightbulb
Electricity is the flow of ______ around a circuit.
Electrons
The regions of a magnet where where the magnet is the strongest
The poles
Name 2 ways to increase the strength of an electromagnet
More copper wire coils or bigger power source
Glass is an example of an ________ because it holds onto its electrons tightly/doesn't give them up.
Metal is an example of a ______ because it holds its electrons very loosely.
Insulator; Conductor
If the light switch is on and the lights are shining, then the circuit is (open or closed)?
If the light switch is off and the lights are off, then the circuit is (open or closed)?
closed; open
Who invented the lightbulb?
Thomas Edison
True or False: All metal sticks to magnets
False: Iron, Nickel, Cobalt, Steel
How can you turn an electromagnet on or off? What happens when it's on? What happens when it's off?
On--magnet, picks up material; Off--no longer magnetic, drops material
Explain what happens when you walk across carpet and then touch a doorknob with your hand and you feel a shock.
Or
How explain how you were able to bend water after combing your hair.
Electrons moved from carpet to body (or hair to comb) making your hand (or comb) negatively charged. Electrons jump (attract) to the positively charged doorknob to neutralize it, causing the shock/static electricity. Negatively charged comb attracts the positively charged water so the water bends towards comb.
In this type of circuit, if one light bulb goes out the others will be affected. Why is this?
Series Circuit--electricity only has one path to flow
What are the two parts that make up a wire and what is their purpose?
Copper--conducts electricity
Rubber outer lining--insulator, allows you to handle it
This type of magnet keeps its magnetism when removed from a magnetic field
Permanent magnet
An electromagnet is created when the flow of ________ through a ________ temporarily magnetizes an object.
Electrons; circuit
Explain how lightning is a form of static electricity
Ice particles bump each other in a cloud. Bottom of cloud becomes negative charged and ground becomes positively charged. Lightning strikes--an electrical discharge to neutralize the charges between the cloud and ground.
In this type of circuit, if one light bulb goes out the other bulbs will not be affected. Why is that?
Parallel Circuit--more than one path for electricity to flow
True or False:
Electricity can flow through all water sources.
False: it cannot flow through pure water; it flows through salt water or other impurities in water
The arrow head portion of a compass needle has this magnet polarity
North (Earth's North Pole has a south pole attraction)
Name an example of an electromagnet used in everyday life
Doorbell, computers, cranes