Static
Static electricity that forms in clouds.
Lightening.
Which way does electricity flow in a closed circuit?
Positive to negative.
What are the two poles on a magnet? what are their charges?
North and south poles
North is positive South is negative
What are the parts of an electromagnet?
Power source
Metal coil
Conductive metal or magnet
Joseph Henry an American scientist made a discovery that electric field can be created by mechanically moving a coil around a magnet, but didn't share his discovery. Why is it very important to share new discoveries in science quickly. Why might Henry decide to keep it a secret?
Scientists use new information to test new theories and make new discoveries quickly, maybe to protect his discovery for money or so his ideas won't get stolen.
What direction does the lightening normally strike? What charge is the cloud and surface
Negative to positive
What part of a circuit is called a cell?
battery
The earth is known as a giant what?
Magnet
What is stronger a permanent magnet or electromagnet? why?
Electromagnet because you can increase the power to increase the strength.
What kind of energy does a motor make? What is the order?
Electricity powers electromagnets, making a magnetic field, that makes the motor spin.
Electricity > Magnetic > Mechanical
What is the name of fossilized tree sap that can be charged easily?
Amber
What materials are conductors and insulators in a circuit?
Conductor is copper wire
Insulator is the rubber tube covering the wire
Where are the magnetic poles on earth located?
In the north and south polar regions but not the geographic poles.
What kind of energy does a doorbell use to work?
Electric energy > Magnetic energy > Mechanical energy
What did Michael Faraday discover?
Changing mechanical energy to electrical energy in a magnetic field.
Describe the process in which we can make two balloons attract and repel each other.
Rub both balloons on wool to repel
Rub 1 balloon on wool to attract
In a parallel circuit why does a resistor stay on if the other resistors are broken or absent?
The resistor has two paths to the battery.
Is the small needle in a compass a magnet? What can interfere with a compass?
How can you tell which direction you're pointing?
Yes, magnet near the compass, the direction the red part of the needle is pointing is your direction.
How do magnets work in headphones?
Electric > Magnetic > Mechanical
What type of magnets are used to make a bullet train levitate and how does it move?
Electromagnets make a bullet train levitate, and they switching of poles push and pull the train to high speeds.
What causes static electricity?
When positive and negative charges are no longer balanced.
What happens when additional resistors are added to a circuit using a battery?
The resistors will get less energy and get dimmer.
What causes northern lights also called auroras?
Magnetic fields at the north and south poles colliding with gasses in the atmosphere.
What does a generator make? How does a generator make it? What are 3 types of generators?
Electricity. move large coils mechanically around magnets. Petrol, wind and hydroelectric.
What are the 4 R's of electric safety?
Respect the power of electricity
Read and follow instructions
Replace worn electric cords
Relocate cords so they aren't tripped over or stepped on