Show What You Know #1 | What is a magnetic field? | Which metal is NOT attracted to magnets? | What happens to a magnetic field when you get further away? | What happens when two similar magnetic poles are put together? | How does a compass work? | | The invisible area of force around a magnet | Copper | It becomes weaker | They repel | The earth's magnetic field attracts the needle |
Show What You Know #2 | What happens when you put the cork in the circuit? | Which material is an electrical conductor? | Which material is an electrical insulator? | What happens to the circuit with 2 light bulbs? | What happens to the circuit with 2 batteries? | What happens to the circuit with 3 batteries? | | The light bulb doesn't light up | Key | Eraser | The light bulbs get dimmer | The light bulbs get brighter | The circuit doesn't work |
Show What You Know #3 | Change the wire material to string. How many iron filings remain on the ground? | Change the wire material to copper. How many iron filings remain on the ground? | Which wire material is the best for making a strong electromagnet? | Try changing the wire thickness (wire gauge). Which picks up the most filings? | Try changing the number of winds. What happens with more winds? | What design makes the strongest electromagnet? | | 500 | 481 | Copper | Thick wire | It picks up more filings | Thick copper wire with lots of winds |
Show What You Know #4 | What it electricity made of? | What is an electric current? | What does the power source do in a circuit? | What does the path of an electric circuit need to be made of? | Why are wires covered with rubber or plastic? | What happens when a circuit is open? | | Moving electrons | A steady flow of electrons | It creates a steady flow of electrons | A conductor | They are insulators | The electrons stop moving |
Show What You Know #5 | What kind of magnetism does electric current make? | What happens when you coil the wires of an electric circuit? | What is different about electromagnets from regular magnets? | What are electric motors used for? | What do electromagnets do in a circuit breaker? | | A circular magnetic field around a wire | The magnetic field gets stronger | Electromagnets can have their poles switched | A computer's hard drive | They stop electric current if there's a power surge |
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