Chemistry is the scientific discipline involved with compounds composed of atoms, i.e. elements, and molecules, i.e. combinations of atoms: their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds. Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds.
squash requires a brief heat treatment, called blanching, in boiling water or steam, to destroy the enzymes before freezing. Cook (blanch) the squash for 3 minutes. Begin counting the blanching time as soon as you place the squash in the boiling water.
Blanching Vegetables Before Freezing. Blanching is a process in which you boil or steam vegetables briefly until they are partially cooked. It is an essential step before freezing many vegetables including broccoli, leafy greens, string beans, okra and asparagus. Vegetables that are frozen without having been blanched are safe to eat but have off colors, textures and flavors.