Show:
Static Electricity
Current Electricity
Ligthning
circuits
miscellaneous
100
What is static electricity?
The buildup of electric charge. The electricity it builds up does not flow.
100
What is current electricity?
Electricity that flows through a circuit.
100
What is lightning?
A big discharge from cloud to the ground
100
What kind of circuits causes wires to heat up and catch on fire?
Short circuits!
100
What is the difference between static and current electricity?
current electricity flows through a circuit. Static electricity does not flow
200
What is discharge? Give an example.
Discharge is when the electric charge that has been built up jumps into another material. Ex. lightning or feeling a "shock" when touching a doorknob
200
If there are gaps and breaks in the circuit, that is a called a _______________ circuit or a __________ circuit.
Open circuit or an incomplete circuit
200
a circuit must be _______ or ___________ in order for current/electricity to flow.
closed or complete
200
What does repel and attract mean?
repel = push away attract = stick together
300
What is an insulator and a conductor? Give an example of each.
Insulator: a material that does not allow electricity to flow through easily. Example: wool Conductor: a material that allow electricity to flow through easily, example: silver, gold, metal
300
To measure how strong an electrical current is, we need to measure in ____________.
amperes
300
What path does lightning like to take?
The shortest and clearest path to the ground. It targets tall objects and good conductors.
300
What are two ways that a circuit can be arranged? Draw them on the board.
series and parallel
300
Name 3 things that need electricity! Do they use battery or are they plugged into the wall?
answer will vary
400
How does something become "negatively charged" and "positively charged"?
When you rub two materials together, negative charges get knocked and collect on a material. The material that collects the negative charges is now negatively charged. The material that got its negative charges knocked off is now positive because it has more positive charges than negative.
400
The filament in a light is an example of a ____________. This is a poor conductor and it can change electrical energy into heat and light.
resistor
400
Explain how lightning is formed in 5 steps.
1. inside a thundercloud, water and ice particles rub together. This separates positive and negative charges. 2. ice particles (positive) gather at top, water particles (negative) gather at bottom. 3. heavy negative water particles stay on the bottom of cloud. 4. compared to the cloud bottom, the ground is positively charged 5. the buildup of charges is too great and the charges jump as a BIG DISCHARGE (lightning!)
400
What are the two tools we can use to protect our homes and school from a short circuit? How do they work?
a fuse - melts when too much electricity flows through it to create an open circuit circuit breakers - a switch pops open when too much electricity flows through it to create an open circuit
400
Which way does electricity flow in a parallel and a series circuit? Draw arrows on the board.
ANSWER ON BOARD
500
Why does a balloon rubbed with wool (or hair) stick to the wall? Explain in 3 steps!
Step 1: rubbing the balloon knocks negative charges off the wool or hair. The negative charges collect on the balloon, making it negative. Step 2: The balloon's negative charges repel negative charges in the wall. This leaves a row of positive charges on the outside edge of the wall. Step 3: The balloon's negative charges is attracted to the positively charges on the wall so they stick!
500
What does a cell do? What are the names of the different cells?
It changes chemical energy to electrical energy. Wet cell, dry cell
500
Name five things that you should or should not do during a thunder storm.
1.Stay away from high places. 2. stay away from tress and other tall objects. 3. crouch down if you feel your hair stand. 4. get out of the water. 5. do not use the telephone.
500
How is a parallel circuit different from a series circuit? Name 3 ways.
1. parallel: each bulb is on a separate circuit. series: both bulbs are on the same circuit. 2. parallel:removing 1 bulb would only make the removed go off. series: removing 1 bulb would make both bulbs go off. 3. parallel:brighter series: dim
500
Are the lights in our school connected in parallel or series circuits?
parallel, we know this because if they were in series circuits, all the lights would come on every time you turned on the switch.