Vocabulary
What is a closed continuous path through which electric current flows?
circuit
Which statement about atoms is not true?
a. inside atoms are tiny particles
b. some of the particles inside an atom have a negative charge
c. some of the particles inside an atom have a positive charge
d. atoms usually have an overall charge
D
The two ends of a magnet are called?
poles
What kind of charge do you see from lightning? What charge is in the bottom of the cloud and what kind of a charge does it have hitting the ground?
ground- positive
What are the two opposite ends of a magnet called?
Poles
What should you do if you hear thunder or see lightning?
a. get out of the water
b. don't use the telephone
c. stay away from high places and tall objects
d. all of the above
D
A switch that protects circuits?
fuse or circuit breaker
What is an electromagnet?
a type of magnet consisting of a coil of conductive wire, usually wrapped around something with iron
What is the continuous flow of electric charge?
current electricity
Which material is a good conductor?
a. metal
b. wood
c. cotton
d. plastic
A
Same poles do what?
repel
What is a generator?
alternate source of current (backup to use for electricity)
a physical field that describes the magnetic influence on moving electric charge, electric current, and magnetic materials.
magnetic field
What is the name for the device that controls the current in a circuit?
a. switch
b. resistor
c. ampere
d. generator
A
Opposite poles what?
attract
Name some ways that turbines are powered?
wind, steam, water, and gas
Positive and negative charges on a material's surface, built up when electrons transfer between objects. (rubbing an object)
Static Electricity
Electrical devices in homes are connected in
a. short circuit
b. series circuit
c. parallel circuit
d. none of the above
C
The current produced by dry cells is called?
direct current
What are the steps by which current travels from a power plant to your home?
power plant
transformers
transmission wires decrease voltage
home