armagedon (Mariana Lover): This is how the bulglar alarm works.The bell does not ring when the "window" is down,because there is no complete circuit.The circuit is complete when the two pieces of copper are touching each other. *
24-08-09 - 01:27:07

armagedon (Mariana Lover): MAKE A TOY VOLCANO:do this experiment with your science teacher's help.You will need these materials-modeling clay(the kind that is mixed with water, NOT oil)-a large metal tray-a shallow metal pan about 3 in. across-ammonium dichromate crystals-match sticks. *
25-08-09 - 01:33:53

armagedon (Mariana Lover): On the metal tray build a cone-shaped mountain, 0r volcano, with the modeling clay.Make a hollow in the top, and fit the small pan into it.The small pan represents the crater at the top of the volcano.As soon as the clay has hardened, you may make the volcano erupt. *
25-08-09 - 01:38:05

armagedon (Mariana Lover): Cover the top of a table with newspaper.Set the tray in the center. *
25-08-09 - 01:39:50

armagedon (Mariana Lover): Yes you can buy the ammonium dichromate crystals from a drugstore.If the crystals of ammonium dichromate are fairly large, mash a few of them so that they can be set on fire more easily.If they are small, they will not need to be powdered.Stand two 0r three match sticks in the crater at a slant to serve as a fuse.Put some fine crystals 0r some powdered ammonium dichromate around them.Then fill the crater either with large 0r small crystals ofammonium dichromate. *
25-08-09 - 01:46:22