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.
As with any vegetable, Brussels sprouts will need to be blanched prior to freezing. 1  Select firm, young, tender heads. 2  Trim, removing coarse outer leaves. 3  Over high heat, bring one gallon of water to a rolling boil in a blanching pot.  Blanch small heads 3 minutes, medium heads 4 minutes and large heads 5 minutes.