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Currently Speaking
It's an Electric World
100
What is Static Electricity? Think about what causes it, and charges.
This occurs when you rub two objects together and there is movement of negative charges.
100
When you connect a battery and one lightbulb with wire, what is this called?
A simple circuit.
100
What is current electricity?
Current electricity is the flow of negative charges (electrons) along a controlled path, through a conductive material (wire).
100
Where do you use electricity?
Home, ipods, xbox, DS, computer, lights, alarm clock, stove, refrigerator
200
Explain how 2 objects repel in Static Electricity.
Two objects have the same charges and they move away from each other.
200
Describe how a series circuit is connected?
A series circuit has 2 or more lightbulbs that are connected side by side in a circular path to a power source.
200
What happens to electrical energy when it is used in a speaker or a stereo system?
Electrical energy is transformed into sound energy.
200
Where does current electricity come from?
A power source. (Batteries, solar power, wind power)
200
Draw a symbol for a battery
See whiteboard.
300
Explain the attraction of 2 objects in Static Electricity.
When two objects have different charges and they stick together.
300
Describe how a parallel circuit is connected?
A parallel circuit is when 2 or more lightbulbs are connected behind one another and the wires run in a parallel way from the power source to the load (lightbulb).
300
What happens to electrical energy when it is used in a toaster?
Electrical energy is transformed to heat energy.
300
What does current electricity travel through?
Conductors (Ex. Metal wire)
300
Draw the symbol for a light bulb.
See whiteboard.
400
What causes the movement of negative charges to create static electricity? Is it controlled or random movement? Give an example.
The movement of negative charges in Static Electricity is random, and is caused by friction. Ex. Balloon rubbing on hair. Feet shuffling on carpet.
400
Explain the brightness of the light bulbs in a series circuit. Explain the brightness of the light bulbs in a parallel circuit.
In a series circuit, as each lightbulb that is added, the brightness of the light bulbs decreases. This is because the light bulbs share the electrical current passing through each bulb. In a parallel circuit, the brightness of the light bulbs is equal. This is because the electrical current has it's own path to travel to each light bulb.
400
What happens to electrical energy when it is used in a motor to turn a fan?
Electrical energy is transformed to mechanical energy.
400
Which way does current electricity flow: From positive to negative poles on a battery. From negative to positive poles on a battery.
From negative to positive poles on a battery.
400
What does it mean to conserve energy? How can you conserve energy?
Conserve energy means to save energy by being aware of what you are using. You can conserve energy in many ways - turn off the lights, unplug your devices when they are not in use. Keep the heat and Air conditioning on low or off when not needed. Timers for electrical devices. etc.
500
How is lightning cause by electricity?
Negative charges build up in the clouds from the movement of air and water. The build up causes the negative charges to repel and the repelling force becomes so strong that the charges then jump to a less negatively charged surface (the EARTH!) This causes a 'spark' in the form of lightning.
500
What happens when one light bulb is unscrewed from a parallel circuit? What happens when one light bulb is unscrewed from a series circuit?
In a parallel circuit, if one light bulb is unscrewed, the other light blub stays lit. The electrical current has another way to get to the light bulb. Each light bulb has its own path through which the electrical current flows. In a series circuit, if one light bulb is unscrewed, the other light bulb does not light up. The electrical current must go through both bulbs. So when one becomes unscrewed, the circuit is broken and all the lights go out.
500
Energy is never __________ or __________ but it is always _____________.
Energy is never CREATED or DESTROYED, but it is always TRANSFORMED.
500
What are the components of a circuit to make current electricity flow? (hint: there are at least 3). Use scientific terms.
A power source (battery) Conductor (wire) Load (lightbulb, motor, buzzer)
500
Do you know of any other power sources for electricity, other than the battery? (BONUS - NOT ON YOUR TEST!)
The following types of power can be collected and changed to electrical energy that we can use in many ways! Water power - hydro electric power - falling water from waterfalls Tidal and wave power - movement of ocean currents (tides) can be harvested to generate power Wind power - windmills Solar Power - Power from the sun's heat can be collected Fossil Fuels - Coal, oil, and natural gas can be burned and used for energy. Nuclear energy