Magnetic or Not? Coins Iron washer Aluminum foil Not magnetic Magnetic Not magnetic Steel refrigerator Magnetic
What is a cow magnet used for? A cow magnet is placed in a cow’s stomach to attract dangerous things (such as nails, bailing wire, and staples) that are eaten by the cow. These man made things can cause the cow serious problems if not for the cow magnet.
Describe the forces around a magnet. (Hint: Think magnetic field.) The field around a magnet where the force of magnetism can be felt. Magnetic items will interfere with this field, while non-magnetic items will pass through without any effect.
Attract or Repel? Opposite poles of magnets attract. Like poles of magnets repel. S S S S NN N N
Does adding magnets together make it weaker or stronger? Stronger!
How did we create static electricity in our classroom? We rubbed balloons on our shirts and hair … This created a charge of electrons to attach to the balloon! We were then able to have the balloons stick to the walls and make the chads dance!!
Will It Conduct? Rubber band Washer Penny NO YES Paper Clip Eraser YES NO
List of Terms Conductor: A material that allows heat energy or electricity to pass through it easily Insulator: A material that does not let heat energy or electricity to pass through it easily Series Circuit: an electric circuit in which the devices are connected in one continuous loop Parallel Circuit: an electric circuit in which each device has its own separate loop
When we made our electric puzzles … What did we use as a CONDUCTOR? Aluminum foil!! What did we use as an INSULATOR? Masking tape!!
What are some ways we practice ELECTRICAL SAFETY in the class? We only used a LOW VOLTAGE BATTERY for our experiments … NOT a wall outlet! We checked to make sure the wires and the battery were not HOT due to the flow of electrons! We made sure our hands were DRY to avoid an electric shock!
How did we make an ELECTROMAGNET? We wrapped wire around an iron nail … Then we connected the wire to a battery to make a simple circuit … The flow of electricity in the wires turned the nail to become a temporary magnet! Increasing the number of times the wire was wrapped around the nail caused the electromagnet to become … STRONGER!!