Show:
Static Electricity
Current Electricity
Batteries
Circuits
Miscellaneous Charges
100
The type of charge that electrons have.
What is a negative charge?
100
The two types of current electricity.
What are AC and DC current?
100
The difference between a wet cell and dry cell.
What is that a wet cell contains a liquid electrolyte and a dry cell contains a thick, paste-like electrolyte?
100
The three main parts of the circuit.
What are the power source, conductor, and load?
100
Tiny electric circuits printed on thin chips of silicon.
What are microchips?
200
This is what two objects with opposite charges do.
What is attract?
200
The type of current used in batteries.
What is direct current?
200
The main difference between a battery and an electrolytic cell.
What is that batteries are made up of electrolytic cells?
200
The reason why a series circuit shuts off all the loads connected to it and a parallel circuit does not.
What is the presence of a single path for the series circuit and multiple paths for the parallel circuit?
200
The reason that many wires are rubber on the outside and metal on the inside.
What is the fact that rubber is an excellent insulator and metal is an effective conductor?
300
The reason that your hair stands up when you touch a Van de Graaff generator.
What is a build-up of negative charges that causes your hairs to repel itself?
300
The difference between an insulator and a conductor.
What is that insulators resist the flow of electrons and conductors allow electrons to flow freely?
300
The three parts of an electrolytic cell.
What are the anode, cathode, and elctrolyte?
300
The different ways a fuse and a circuit breaker handle an excessive amount of current.
What are melting (fuse) and opening a switch (circuit breaker)?
300
The reason that many cords have three prongs on the end instead of just two.
What is an extra prong serving as a ground wire?
400
The scientific explanation for lightning.
What is a build-up of negative charges in clouds, which must be discharged into the positively charged ground?
400
An example of a technology that uses superconductors.
What are maglev trains and MRI machines?
400
A rechargeable battery is able to be recharged through this process.
What is an electric current that reverses chemical changes in a used battery?
400
Four rules of electric safety discussed in your textbook.
What are not touching outlets with fingers or objects, never playing with electric cords, never touching electric devices while wet, never playing near electrical wires, avoiding DANGER: HIGH VOLTAGE areas, never climbing electric poles/towers, not climbing trees near power lines, not throwing objects near utility poles, and flying kites away from power lines.
400
Two advantages and disadvantages of rechargeable batteries.
What are long-term cost savings, less waste, and fewer toxins (advantages); waiting, loss of ability to hold charge, higher tendency to explode or catch fire, and toxic chemicals (disadvantages)?
500
Three ways that people have used static electricity to benefit society.
What is reduce pollution, make photocopies, create removable signs, and spray paint cars?
500
The way that electricity travels to your home (in 5 steps).
What is 1. Starting in a power plant 2. Going through wires to a transformer that increases voltage 3. Traveling along power lines 4. Going through a transformer that decreases voltage 5. Traveling through wires to your house?
500
The four main steps in the cycle of the electrolytic cell.
What is that: 1. Electrons build up on the negative terminal 2. Electrons flow through the conductor 3. Electrons return to the positive terminal and 4. Electrons travel through the electrolyte, back to the negative terminal?
500
This occurs when insulation wears away from electrical wiring, causing the current on exposed wires to catch fire, create sparks, or cause a shock.
What is a short circuit?
500
Three types of semiconductors devices.
What are diodes, solar cells, photocells, and transistors?