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.
Here is a list of vegetables that freeze well when you blanch first and how many minutes they should remain in the boiling water or steam: 1  Artichoke hearts - 6 minutes. 2  Asparagus - 2 to 4 minutes depending on the stalk thickness. 3  Beans, green or wax - 3 minutes.  Broccoli, cut in 1-inch pieces - 2 minutes.