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Kucera Magnetism
Kiewit Middle Magnetism
| Question | Answer |
|---|---|
| Which culture is given credit for discovering magnetism. | The Greeks |
| According to legend, where was magnetism discovered? | Magnesia (Modern-day Turkey) |
| What is the abilitiy of a material to create a magnetic field and attract materials like iron and cobalt? | magnetism |
| What is an object that will attract objects made of iron, nickel and cobalt? | magnet |
| What is responsible for creating a material's ability to either repel or attract objects made of iron? | magnetic force |
| What is the term for the 3-D region around a magnet? | Magnetic field |
| Which particle in an atom is responsible for creating magnetism? | the electron |
| These parts of the magnet are where the magnetic force is strongest. | the magnetic poles |
| Unlike poles will...... | attract |
| Like poles will........ | repel |
| What are tiny groups of atoms called whose magnetic fields are aligned? | domains |
| True or false: The more domains that are aligned in an object, the greater its magnetic force. | True |
| The type of magnet is easy to make but it also loses magnetism easily. | temporary magnet |
| This is an alloy of three metals used to make magnets. | alnico |
| This is where the Earth's magnetic south pole is found. | Geographic North |
| This is where the Earth's magnetic north pole is found. | Geographic south |
| This phenomenon occurs when the Earth's magnetic field interacts with charged particles from the sun. | an aurora |
| The northern lights: | aurora borealis |
| The southern lights: | aurora australis |
| The spinning, molten Fe and Ni in this part of Earth creates our magnetic field. | Earth's core |
| He was the first to discover a connection between magnetism and electricity. | Oersted |
| A coil of wire that produces a magnetic field. | solenoid |
| Two ways to increase a solenoid's strength are: | more loops of wire and/or more current |
| This is made up of a solenoid wrapped around an iron core. | electromagnet |
| Three ways you can increase the strength of an electromagnet are: | more loops on the solenoid, more current, and/or a bigger iron core |
| Two big advantages of using an electromagnet are being able to: | turn it on/off and/or change its strength |
| What common household device (in older homes) has an electromagnet in it? | doorbell |
| This device converts electricity into mechanical (kinetic) energy: | electric motor |
| This rotating loop or coil of wire is found in an electric motor: | armature |
| This part of an electric motor reverses electric current: | commutator |
| This device is used to measure magnetically induced electric current: | galvanometer |
| This occurs when passing a magnet through a coil of wire. | Induced current |
| He discovered that elecricity could be made from magnetism. | Faraday |
| A device which makes electricity from mechanical energy. | electrical generator |
| This is the type of electrical current made from generators: | alternating |
| This device changes voltage from one amount to another. | transformer |
| This device will increase voltage: | step-up transformer |
| This device will decrease voltage: | step-down transformer |
Created by:
Mr. Kucera
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