« November 2007 | Main | January 2008 »
1 green pepper (w/o seeds)1 tbs capers
3 small sweet peppers (w/o seeds)
1 large onion
2 garlic cloves
3 cilantro leaves
1/2 tsp oregano
This is way cool: collecting micrometeorites!
The Geminid meteor shower is tonight. Why not celebrate by collecting some meteorites?
The actual steps are quite easy:
Collecting Micrometeorites
In order to increase your chances of finding any micrometeorites, you need to collect material which is likely to have a higher than average concentration of micrometeorites. The roof of a house or building makes a good collector of micrometeorites, since they are continuously falling from the sky. When it rains, the dust, pollen, micrometeorites, and other debris will be washed from the roof and carried to the rain gutters and downspouts by the rushing water. If you check these areas, you will find a very fine powdery material. This fine dust is likely to be rich in micrometeorites. Ordinary dirt does not work as well: it should be fine dust.
Follow the instructions of your lab supervisor in collecting the dust. You can look around the downspouts, in the cracks of the sidewalks, or on the roof of McLane Hall. Use a magnet to pick up this fine dust, to collect any micrometeorites that are high in iron. Smear this dust onto the sticky part of a sticky-note card. Once back in the lab, use a microscope to examine the on the sticky-note card. The micrometeorites will be shiny and spherical, because they were once melted. Other than in meteors, few processes in nature (volcanoes or lightning) are hot enough for long enough to vaporize iron. Any naturally occurring spheres of iron are therefore micrometeorites. Once you find one, try to separate it from the other material using a straight pin or tweezers. Look for more micrometeorites in your sample.