We have been super busy this term diving deep into the invisible and mysterious force - magnetism!
To start with we experimented to show the force field around a magnet, used a compass to demonstrate the earth's magnetic field, created a magnet race game and even learnt how the Aurora Borealis (Northern Lights) work! The iron filings were a big hit.
Creating a magnetic race track
Visualising magnetic field lines
Measuring the strength of a magnet
Moving the iron filings to get the best result
We also kicked off the Invent It! Tangram puzzle challenge this term. I could tell from how quiet everyone one was that this was a real hit and really engaged everyones brain ready for the rest of the class.
Getting creative with a Tangram man
Working hard to solve the puzzles
Tangram cat
All the Tangram pieces
We then coded our microbits using conditional logic (If statement) to sense the Earth's magentic field and report the magentic bearing on the screen. We tested them out in the hall for a treasure hunt, which demonstrated nicely the significance of accuracy, errors and calibration - we all ended up in different places!
Microbit in action!
A bit lost after our nvaigation exercise
Pacing out the to find the treasure
Electromagentism was the last topic and we had some great fun with this making an electromagnet and creating a sensor that turned magnetic field strength into a sound. This enabled us to follow a wire carrying an electrical current around the class room.
Electromagnet - it works!
Using both poles = more paper clips
Using the microbit to follow the magnetic field around a wire carrying an electrical current ... blindfolded!
Turning Electromagnets on ... and off
Finally, we built devices where the interaction between magnetic fields and electric currents produced motion, a Motor! They were a bit fiddly but we all got them working in the end.