can you make a compass using a book of matches?
830110
In a survival situation, I'd sooner keep the matches dry and just see which direction the shadows fell in the afternoon - that's east - the other three directions then become pretty evident.
154822
Since you are teaching cub scouts, and not geology students, I will assume you are using some of those simple orienteering compasses with the rectangular plastic back. These are good for simple compass work. Rather than give you a long explanation take a look at this excellent website which explains how to turn the compass housing so you can walk in your chosen direction.\n\nHere it is:\nhttp://www.learn-orienteering.org/old/lesson1.html\n\nFor this level you don't have worry about declination, which is the difference between a compass reading and true north.
33674
Whe teaching basic navigation we cover the difference between magnetci and grid north.  Previous answer here is good.  But I would like to add the ditty we use to remind people to apply the variation figure when moving from the map to compass and vice versa.\n\nwhen taking bearing from the map and putting onto the compass add the variation (From grid to mag ADD)\n\nWhen applying a compass bearing to the map then take the variation off. (From mag to grid get rid).\n\nAlso the amounbt of variation and its direction will vary depending on where you are on the earth.. In the UK the magnetic variation is about 6 degrees West.\n\nWe use the ditty "Variation East Compass Least (ie take the figure off the magnetic reading)- Variation West Compass Best." (ie add it to the magnetic reading.)
585436
For an arbitrary angle, no.  There is an interesting algebraic proof to show that it is not possible to trisect an angle with a straightedge (no markings) and compass alone through the construction of a field.  Now it is obviously possible for certain angles such as the right angle to be trisected.  However, the subset of angles which can be trisected has measure 0 in the set of all possible angles (countable in an uncountable set).\n\n(See source below for more.)
561268
In Civil Engineering, it is always important to include a compass rose (or North arrow) and a scale (to show how the plan distance translates into actual distance) on each plan sheet.  Existing conditions need to be shown as accurately as possible.  The new design should be clear and well thought out.  Especially important is that each plan sheet is to be stamped and signed by a registered professional engineer.
81040
Pictures of a Lensatic Marching Compass\nhttp://www.brasscompass.com/lensaticmarching.htm\n\nA Lensatic Marching Compass is a type of 'sighting compass'\nhttp://www.thecompassstore.com/sighting-compasses.html\nhttp://www.thecompassstore.com/compassfaqs.html\nhttp://www.eyehike.com/pub/Basics%20of%20Wilderness%20Navigation.doc\n\nBasic Guides to Compass Use & Orienteering\nhttp://www.learn-orienteering.org/old/\nhttp://www.us.orienteering.org/\nhttp://www.thecompassstore.com/howtousemapa.html\nhttp://www.ussartf.org/compass_basics.htm\n\nThis site has a section titled "How to Use A Lensatic Sighting Compasses"\nhttp://www.spidercanyon.com/backiss/mapnav3b.html
893112
hope this helps\n\nthank you wiki\n\nhttp://en.wikipedia.org/wiki/Compass
409326
I haven't used this, but it looks fairly simple (as opposed to the professional mapping products):\n\nhttp://www.smartdraw.com/specials/geography.asp?type=12195&id=12195\n\nGood luck
751528
Yes.  For example, take the two from the top left corner, and the two from the bottom right corner, and make a new square touching the top right corner.\n\n\nAAAA BBBBB\nC.........D..........E\nC.........D..........E\nC.........D..........E\nFFFFFF GGGG\nH.........I............J\nH.........I............J\nH.........I............J\nKKKKK LLLLL\n\nbecomes\n . . . . . . . . . . . . . AAAA\n . . . . . . . . . . . . .C . . . . J\n . . . . . . . . . . . . .C . . . . J\n . . . . . . . . . . . . .C . . . . J\n. . . . . . .BBBBB LLLLL\n. .........D..........E\n. .........D..........E\n. .........D..........E\nFFFFFF GGGG\nH.........I\nH.........I\nH.........I\nKKKKK
102173
Making a map (reducing)\nLooking at something with a magnifying glass (enlarging)\nUsing a blueprint to construct a building (enlarging)
95871
You can use a pyramid of cards to teach coordinate geometry (tessellations).  You can use it to teach Pascal's Triangle (permutations & combinations)
414734
bring the magnets close to each other. If u feel any repulsion, that means u have tried joining opposite poles.\nWith this test u just come to know of the repulsive and attractive sides relative to a magnet. No qualitative nalysis of which is North pole and which is south cannot be done! But hey! If the bar magnet is painted red on one side, then that would be the north pole!
1087633
arent u supposed 2 rub a magnet on the neddle first then stick it through a cork to make  a compass that floats
901044
Well you could use the foot of a rocking chair and then take the  elastic out of your tighty whiteys, tie them at both ends and finally use sharpened pencils as arrows.......and there you go homemade bow n arrow
1005263
I remember the line markers maybe you can rent one near you at a rental store.\n\nAre try to design and make one.
344004
With a compass that doesn't point north. lol
1017244
REF YAHOO SEARCH IN YOUR RESEARCH ANSWER YOU GET THE ENTIRE HISTORY OF MATCHING AND HOW TO GO ABOUT IT.\nGOOD LUCK