PHET Magnetism Part 1: Go to: https://phet.colorado.edu/en/simulations/magnets-and-electromag nets 1. Move the compass slowly along a semicircular path above the bar magnet until you've put it on the opposite side of the bar magnet. Describe what happens to the compass needle. 2. What causes the compass needle to move like it does? Use key terms. 3. How is the strength of the force/torque on the compass needle indicated? 4. What are the similarities between the compass needle (magnetism) and a test charge (electricity)? 5. Move the compass along a semicircular path below the bar magnet until you've put it on the opposite side of the bar magnet. Describe what happens to the compass needle. 6. How many complete rotations does the compass needle make when the compass is moved once around the bar magnet