What kind of reaction forms a peptide bond

A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the the other molecule releasing a molecule of water (H2O) 
It's a dehydration synthesis reaction (AKA Condensation reaction) and usually occurs between amino acids

The speed of  sound:   sound travels  at different speeds depending on what it istraveling through. of the three mediums (gas, liquid, and solid)  sound waves travel the slowest through  gases, faster  through  liquids, and fastest  through  solids.