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.
Blanch for Longer Storage. Blanch zucchini slices to keep them longer. Blanching preserves the nutrients and flavor well, so blanched zucchini can be frozen for up to one year. To blanch, boil a large pot of water, then boil the zucchini slices in the water for three minutes.