Announcements and upcoming events part 1.

1. Friday is the last day to turn in anything you have a zero for. After Friday, the zeros will stay.

2. I am contemplating giving the nine weeks exam early (poss. 3/13 or 3/16) so that we may have the last two weeks of the quarter to devote to upcoming activities and G.R.A.S.P. projects.

3. Speaking of the G.R.A.S.P. projects, here they are...
- 3RD NINE WEEKS G.R.A.S.P. [ADVANCED]


Goal:
To understand the relationship between electricity and magnetism.

Role:
You are a scientist for the world’s largest ship builder.

Audience:
Your audiences are the owners of the ship building company

Situation:
Your company has designed a compass to be used in emergencies at sea, but it doesn’t seem to be working correctly when it is located near the solenoids in the engine. You have been asked to design a test to determine the effect of the engine on the compass.

Products:
You need to design and create a test that will determine what is affecting the reliability of the compass. Your product must
include a labeled diagram of the engine part that is affecting the compass, the data that you collected and the final conclusions
in the form of recommendations for the owners.
Solenoid Directions
Materials and equipment (per group)
battery (6V)
compass
iron rod, bolt, or nail
metric ruler
tape
cardboard tube from paper towel
wire with stripped ends (700 cm)
Label the ends of the tube A and B. With the tube horizontally, place a piece of tape 20 cm from the end of the wire Tape this spot to the A end 1 cm from the edge. Wrap the long end of the wire tightly around the tube 50 times without overlapping, but closely together. Tape the wire at B with 20 cm left over. Attach wire A to the battery.
Place the compass 2 cm from the B end Record your prediction, what will happen when you connect B wire to the battery
Record what actually happened
Next, predict what will happen if the iron rod is placed inside the tube.
Record what actually happened

Conclusion:
What was the effect of the iron rod on the compass?
What does this tell you about the placement of the compass?

Advanced students this is based on the solenoid activity we are doing this coming Friday and on the previous compass activities. To my parents, I will accept the following donations for this activity: lots and lots of insulated wire. Working compasses. Spare bar or refrigerator magnets that still have a strong magnetic field. 6 V batteries (the kind they use in the big outdoor flashlights. Wal-Mart sells two packs for 2.98. You may do this activity at home if you wish but I am setting aside class time to perform this as well.