PLS HELP ASAP NO LINKS What is a useful technology developed from scientific observations on the nano scale?
carbon nanotubes for stain resistant textiles
laser manipulation of molecules
the production of microchips

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

Use the half-reactions of the reaction au(oh)3 + hi -> au +i2 +h2o to answer the questions