Electricity is similar to running water, but more complicated and mathematical. My metaphor is a watermill. Amps is like the rate of water flowing through a channel, volts are like the pressure the water pushes with, and ohms are the amount of resistance the water meets, mostly from the load or watermill. You divide the water pressure (volts) by the resistance (ohms) to calculate the flow rate (amps.) Then there's watts which is a measure of actual power, and can be calculated in numberous ways such as volts * amps, that would determine both the speed and strength the watermill turns for its purpose. So voltage is like strength or pressure while amperage are the rate, and you multiply the two for the wattage like multiplying the bang for the buck by the rate of bucks to determine just how bright your lightbulb will light up. Another common term is kilowatthours or kWh that appears on your power bill meaning the number of thousand watts times hours used.

Watt = energy used per second (remember the watts on a light bulb, you can plug different bulbs in and everything is the same except the energy used) Volt = amount of electrical pressure (remember the volts in your house wiring, it can be 110 or 220, and if it's 220 you'll fry your 110-volt appliances) Amps = amount of current = number of electrons going thru the wire per second (15 or 20 amps is the typical max load on a house circuit, too many amps and you'll trip your breaker, an appliance "draws" amps depending on the amount of work it's doing) Ohms = resistance, it's a property of the appliance even when it's not plugged in -- toasters have lots of ohms

1) If there is a difference of electrical "level" (potential difference) between two points, electrical stream can flow between them as soon as a conductor (for instance wire) is put between them. The difference of electrical "level" (potential difference) is measured in volts (V). The intensity of the electrical stream between the two points means how strong it is or the amount of electric charge flowing between the two points. The intensity of the electrical stream is proportional to the potential difference. The proportional factor is called the resistance of the conductor. V = R * I R is the resistance of the object, measured in ohms, equivalent to J·s/C2 V is the voltage across the object, measured in volts I is the current through the object, measured in amperes "When there is a current I through an object with resistance, R, electrical energy is converted to heat at a rate (power) equal to P = I² * R where P is the power measured in watts I is the current measured in amperes R is the resistance measured in ohms" 2) here more details: "The watt is the rate a source of energy expends or produces one joule during one second, so the same quantity may be referred to as a joule per second, with the symbol J/s. It can also be written as kg·m2·s−3. It is equivalent to one volt ampere (1 V·A) or 1/746 of a horsepower." http://simple.wikipedia.org/wiki/Watt "The volt is defined as the potential difference across a conductor when a current of one ampere dissipates one watt of power." http://simple.wikipedia.org/wiki/Volt "The ampere or amp (Symbol: A) is a unit of electric current or amount of electric charge each second. The amp is an standard unit. It is named after André-Marie Ampère who discovered electromagnetism. Electric current is the rate of change or displacement of electric charge. One amp is the rate of one coulomb per second. The amp is defined by two wires that go in the same direction as each other. They are placed one metre apart in a vacuum. They are infinitely long and very thin. One amp is the current that would produce an attractive force of 2×10–7 Newton per metre of length between these wires." http://simple.wikipedia.org/wiki/Ampere "Electrical resistance is the repulsion of a current within a circuit. It explains the relationship between voltage and electrical current. Resistance, discovered by Georg Simon Ohm, is the ratio between voltage and current." "R= V / I R is the resistance of the object, measured in ohms (Ω) V is the voltage across the object, measured in volts (V) I is the current going through the object, measured in amperes (A)" http://simple.wikipedia.org/wiki/Electrical_resistance

I'll give it to you in layman's terms, without resorting to the running water analogy: Voltage is energy potential. It is the measure of electrical charge. Measured in VOLTS Current is the movement of that charge along a path. Measured in AMPS Resistance is the oppostion to that current flow. Measured in OHMS. Power is a measurement of electrical work. Just wait, we'll get back to that one, because it's the hardest to conceptualize. Measured in WATTS. To visualize charge, you need to think about it in terms of a bunch of electrons "hanging out" in one part of a circuit. Ultimately, electrons want to move until all parts of a circuit have the same amount of charge. (ground state) So, the area of highest charge is the source, and electrons flow from this source to the area of lowest charge. That's current. Depending on what materials the electrons need to move through, it may take a long time for them to do that. That concept is resistance, and it direstly affects the RATE that the current flows, giveing rise to Ohms'Law. Voltage divided by resistance yields current. I wouldn't stress so much about watts until you have the relationship between voltage, current and resistance down. But, just so you know, Power (measured in Watts) is equal to voltage times current.

There is a memory aid called a "PIRE Wheel," readily searchable on the Net. This wheel shows all common calculations that relate voltage, current, resistance and power.

First off, they are all, as you are probably aware, units which are used in the measurement of electricity, electricity being the movement of electrons in a conductor. You can think of voltage as being the force with which the electrons of the electrical current are being pushed through the conductor. The higher the voltage, the more forceful and powerful the 'push.' Amps, or amperes measure the number of electrons that make up the current. The higher the number of amps in an electrical current, the more electrons there are in that current. Ohms measure how strongly the conductor resists the flow of electrons (the electrical current). The higher the ohms, the more strongly the conductor resists the flow of electricity. Finally, watts measure power, which is the work done. Specifically, one watt of power is the work done by one ampere (the number of electrons in the current) flowing at one volt (the force with which the electrons in the current are being pushed).