245 reported on the synthesis of linear but alsobranched polymers prepared by di-, tri-, and tetra-alkyne andazide monomers like the combination of tripropargylamine(B 3)and(dihydroxymethyl)(diazidomethyl)amine(A 2)(com-pare the general outline in Scheme 17).
When discussing mineral formations in caves, we often talk about stalactites and stalagmites. A stalactite is an icicle-shaped formation that hangs from the ceiling of a cave, and is produced by precipitation of minerals from water dripping through the cave ceiling. Most stalactites have pointed tips.
A meteorite is a rock found on the surface of the planet that has come from space. In space they are called meteoroids, when seen burning in our atmosphere as shooting stars they are called meteors and when found as rocks on the surface, having survived the journey through our atmosphere, they are called meteorites. meteorite is a rock that fell from space and survived the heat and pressure of falling through the atmosphere and landed on Earth. When it was a streak of light in the sky, it was a meteor.