Show:
Magnets
Electromagnets
Generators and Motors
Energy and Conservation
Miscellaneous
100
Magnetism is the strongest here.
What are the poles
100
What is an electromagnet?
What is when an electric current flowing through a coil of wire wrapped around a solid iron core?
100
What is a generator?
A generator is a machine that turns mechanical energy into electrical energy.
100
What are at least two renewable energy sources?
Biomass hydroelectricity wind energy tidal energy solar energy
100
What are the 4 steps of producing wind energy?
1. The wind turns the blades of the wind generator 2. The rotor attached to the shaft turns 3. As the shaft turns it causes the gears in the gear box to turn 4. The gears cause the generator to turn, producing electricity.
200
What are two causes of earth's magnetic field?
What is the earth has an Iron and nickel core 1. And the earth rotates 2.
200
List at least two things that electromagnets are in.
What are motors, generators, doorbells, some telephones, and computers that to perform basic functions.
200
What are 3 types of mechanical energy?
What are hand cranks, wind, and moving water.
200
What is hydroelectricity?
Hydroelectricity is electricity that is produced by moving water.
200
What is a penstock?
What is a large tube that carries water to the turbines.
300
A temporary magnet is made this way.
What is by taking a magnetic substance and stroking it against a permanent magnet?
300
What are the three main parts of an electromagnet?
A power source, a coil, and an iron or nickel core.
300
What is an electric motor?
What is a motor that uses electromagnets to change electrical energy into mechanical energy.
300
What is geothermal energy?
What is thermal energy from within earth.
300
What is a transformer?
What is a device that can alter the voltage to push the electric current over a long distance.
400
What are three materials that stick to magnets?
What are Iron, Nickel, and Cobalt?
400
How can you increase the strength of an electromagnet?
What is to make more loops of the wire?
400
List the four parts that an Ac motor consists of.
What are the rotating wire coil or armature, an alternating electric power source, brushes that transfer the electric current to the armature, permanent magnets that use the electric current to cause the wire armature to turn.
400
What are solar panels made of?
What are many solar cells.
400
What is the difference between a generator and a motor?
What is that a generator converts mechanical energy to electrical energy, and an electric motor converts electrical energy into mechanical energy.
500
Describe what happens to magnets in these situations: A. North pole to North pole B. South pole to South pole C. South pole to North pole D. North pole to south pole
A.repel B.repel C.attract D.attract
500
How many pounds can some electromagnets hold?
What is 2,200 pounds or 1,000 kilograms.
500
What are the steps in the electric power grid?
1. Power plant 2. Generator 3. Turbine 4. Transformer 5. High voltage power lines 6. Transformer 7. At home, the current flows through a meter that measures how much electricity your family uses. 8. electricity travels through wires in the wall to the outlets and switches in you home.
500
What are two ways to conserve energy?
What are turn off lights, replace incandescent bulbs with efficient LED or CFL bulbs, close doors or windows when heating or cooling a room, and conserve water.
500
what is a commutator?
What is a motor made to run on direct current has a switch that reverses the current.