COMPASSES

wow this weekend was way too short. but yay for 4-day school weeks :) sooo on saturday night i went running cause i felt like it. it was actually kinda dark except for the yellowy streetlights. the physics concept in this is a compass. in the unlikely situation of getting lost running in your neigborhood when its dark at night, a compass could come in handy. a magnetized compass needle aligns with earth's magnetic poles. the angle between the magnetic and geographic poles of the earth is called the magnetic declination. by using the compass, i would be able to find my way back home safely.