Charges
Electric Current
Magnets
Magnetic Earth
Electromagnets
100
What are the two types of electrical charges?
Positive and Negative Charges
100
Jerry is making an electrical circuit. He uses a battery and 3 light bulbs. The circuit is correctly linked in a series circuit. Draw the circuit. What will happen if one of the bulbs burns out?
None of the lights will shine
100
How are magnets like Earth?
They both have north and south poles
100
Ivan is sailing in the ocean. Explain how his compass can help him find his way.
the needle of a compass will point to or be attracted to Earth's magnetic north pole.
100
What is an electromagnet?
An electromagnet is a strong temporary magnet that uses electricity to produce magnetism.
200
When objects with like charges are brought close together they will _____.
repel or move away from each other
200
Kyle is making an electrical circuit. He uses a battery and 3 light bulbs. The circuit is correctly linked in three parallel circuits. Explain what will happen if one of the bulbs goes out?
Only the burnt out light will not shine because the other current can take an alternate path to complete the circuit.
200
If 2 magnets are stuck to each other, which poles are touching? Explain why.
N-S or S-N Opposite poles attract, if the magnets are stuck together then opposite poles must be touching.
200
How are magnets similar to Earth
They both have north and south poles and a magnetic field
200
What can increase the strength of an electromagnet?
using more batteries, or wrapping the wire around the iron more times
300
When objects of unlike charges are brought close together, they will ______.
attract or move towards each other
300
If a light from the lamp is on, is it considered an open or closed circuit? Explain why.
If the light is on it is a closed circuit. The electric current has a closed pathway to complete the circuit with no openings or gaps.
300
Describe the difference between a temporary and permanent magnet. Give an example of each.
a temporary magnet is a magnet that acts like a magnet for a short period of time ( iron nail rubbed against a permanent magnet) A permanent magnet is a magnet that keeps its magnetism for a long time ( needle on a compass)
300
Earth acts like a giant magnet because_____.
the core of earth is made of molten iron that spins- the spinning particles produce a magnetic field with two magnetic poles.
300
How does electric current create magnetism?
A magnetic field is created from the flow of electric currents
400
What is static electricity? Why is your hair attracted to a comb after you comb it?
A build up of electrical charges. Your hair is attracted to the comb because your hair and the comb have opposite charges.
400
If Jack turns on his radio while doing his homework and all the power in his room goes out, what kind of circuit connection does Jack have in his room? Explain why.
A series circuit- In a series circuit the current goes through each item in a series or one after another. If one thing goes out, the electrical current does not have a complete pathway or circuit.
400
The space in which the force of a magnet can act is called the _________.
Magnetic field
400
Give directions for building a compass. Why do you need to use the water?
a bowl of water, a floating device, and a temporary magnet- You need the bowl of water to allow the temporary magnet to move freely and spin. It will point to Earth's magnetic north pole.
400
Electromagnets that are used in motors, generators and doorbells work by converting the electrical energy into ____.
motion energy
500
Explain what happens during a static discharge.
A buildup of negative charge is released, sometimes causing a spark.
500
Explain the differences between conductors and insulators. Give one example of each.
a conductor is a material that allows electrical current to pass through it ( metals, tap water,) an insulator is a material that does not allow electrical current to pass through it ( wood, plastic, pure water)
500
Will a paper clip outside of a magnet's field be pulled toward the magnet? Why?
No because an object will only be attracted to a magnet if it is within the magnetic field of the magnet.
500
What causes the auroas?
Auroras are caused by particles from the Sun interacting with Earth's magnetic field and atmosphere.
500
Explain how a doorbell is an electromagnet.
the button turns on the electromagnet which pulls the metal hammer towards the bell.
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