I think d
Rust is a molecule that is composed of two element As the rust forms on the surface of the iron, it flakes off to expose more iron, which will continue to rust. Rust is clearly a substance that is different from iron. Rusting is an example of a chemical change
Answer:7) europe had high demands for wheat which gave american farmers opportunity to sell plenty and raised the value of the crop.
8) poverty that led the poor agriculture techniques, extremely high tempatures, long periods of drought and wing erosions.
9) by 1940s 2.5 million people had moved out of the plain states . of those 200,000 moved to california
