| Question |
 |
|
| Answer |
|
|
| electricity begins at the______ level where protons and electrons have electric charge. |
atomic |
| ___________ carry a positive charge. |
protons |
| Electrons carry a what charge? |
negative |
| what forms when atoms lose or gain electrons and become positively or negatively charged? |
ions |
| what kind of charge is the build up of electric charge on an object? |
static charge |
| a flow of charge can be caused by ions moving in a what? |
solution |
| all objects exert an what on each other; it can be attracted or repulsive? |
electric force |
| like charges repel and unlike charges do what? |
attract |
| electric charges exert a force on each other at a distance through an ___ which exists around every electric charge. |
electric field |
| what is a material which does not allow electrons to move? |
insulators |
| what is a material that all electrons to move easily threw it? |
conductor |
| what is a rapid movement of excess charge from one place to another? |
electric discharge |
| what provides a pathway to drain excess charge into the earth; lightning rods help ground buildings? |
groundings |
| what flow of charge through a conductor? |
electric current |
| what flowing charge goes threw a solid? what flows threw a liquid? |
electrons, positive or negatively charged ions |
| what closed conducting loop through which electric currents continuously flow? |
a circuit |
| current what can do work in an elecric device; it carries electrical energy through wire? |
flow |
| what measures how much electric energy a battery can provide? |
voltage |
| electrons move in a circuit and have millions and millions of what? |
collisions |
| the voltage in a battery depends on the amount and type of what used to create the chemical reaction in a battery? |
chemicals |
| batteries what when the original chemicals are used up and the chemical reactions in a batery stop? |
die |
| What is the measure of how difficult it is for electrons to flow through a material? |
resistance |
| insulators generally have much what resistance then conductors? |
higher resistance |
| when the amount of electric energy that is converted into thermal energy what as the resistance wire increases? |
increases |
| the length and what of a wire affect electron flow? |
diameter |
| the amount of current is determined by the what, and supplied by a battery and the resistance of the conductor? |
voltage |
| as the resistance in an electric current increases, the current in a circuit does what? |
decreases |
| what law equals this current=voltage/resistance? |
ohm's law |
| when the voltage in a circuit increases, the current does what? |
increases |
| there are how many kinds of basic circuits? |
2 |
| what are the two kinds of circuits? |
series and parallel |
| what is a series circuit? |
it has only one path for the electric current to flow. |
| what is a parallel circuit? |
it has more than one path for electric currents to flow |
| for safety, circuits in homes and buildings have what? |
fuses |
| or what else do buildings and homes have? |
circuit breakers |
| a rate at which an appliance converts electrical energy to another form of energy is called what? |
electric power |
| What are watt? |
The unit of power |
| Electronic companies charge customers for the number of _________________ they use each month? |
kilowatt-hours |
| Electricity can be ____________? |
dangerous |
| Current can enter your body and shock you when your body accidentally becomes part of _________________? |
electric circuit |
| Lightning can deadly; if caught outdoors near lightning use a ________________ squat on the balls of your feet with hands on knees |
lightning-safety |
| Atoms are made up of ______________ charged protons. |
positively |
| Atoms are made up of ______________ charged electrons. |
negatively |
| What type of charge do neutrons have? |
they are neutral (they have no charge) |
| What happens when salt (NaCl)dissolves in water? |
The sodium ions and chloride ions break apart. |
| When sodium ions and chloride ions break apart, what happens? |
The ions are now able to carry electric energy |
| What do positive charge and a negatively charge do? |
They attract each other. |
| What do two positively charged particles do? |
They repeal (run from) each other? |
| What do two negativity charged particles do? |
They repeal (run from) each other? |
| Electric charges move easily through conductors then________? |
insulators |
| When a spark jumps between your fingers and a metal doorknob starts where? |
your feet |
| What does a lightning rod do for a building? |
protects it from getting damaged |
| What is need to electrons to flow for a battery to work? |
The electrons must flow, through a closed circuit, from the negative battery terminal to the positive battery terminal. |
| what happens when an alkaline battery is connected to an electrical circuit? |
Chemical reactions occur in the moist paste of this alkaline battery that the move electrons from the positive terminal to the negative terminal. |
| What happens as electrons flow through a wire? |
They travel in a zigzag path as they collide with atoms and other electrons. |
| What happens when electrons collide as they travel through a wire? |
They lose some of their some electronic energy. |
| When water and electrons, what influences the resistance? |
The diameter and the length of the conductor. |
| What two types of hoses increase resistance? |
long or narrow. |
| What happens when you hold a bucket of water higher? |
It will increase potential energy of the water in the bucket. |
| How does holding a bucket of water increase potential energy? |
It causes the water to flow out of the hose faster |
| What is a series circuit? |
A series circuit has only one path for electric current to flow |
| What is a parallel circuit? |
A parallel circuit has more then one path for electronic current to flow |
| What does a fuse do? |
A fuse contains a piece of wire that melts and breaks when the current through the fuse becomes too large. |
| What do electronic meters do? |
They ensure the amount of electric energy used in kilowatt-hours. |
| V = |
R × I |
| I = |
V / R |
| R = |
V / I |
| voltage |
symbol = V; also called volt
Sign V |
| current |
symbol = I; also called ampere (amp)
Sign A |
| resistance |
symbol = R; also called ohm
Sign Ω |
| power |
symbol = P also called watt
Sign W |
Beef Production
