What are four changes that happen to vegetables when they are cooked?
What changes occur in vegetables when cooked and overcooked? Some nutrients lost to water and heat; cellulose is softened, cooked vegetables get tender, overcooked get mushy; overcooking turns green vegetables unpleasant olive color; cooking releases and mellows flavor, overcooking creates unpleasant flavors.
What are the changes that occur during cooking?
These vary according to the commodity and cooking method but may include changes in moisture, fat content, flavour, texture, colour and nutrient composition. These changes depend on the temperature — time relation within the food, and this in turn depends on the transfer of heat to the food and within the food.
What are physical changes in food?
During food processing and preservation, various physical changes (e.g., melting, crystallization, glass transition) occur in food products, affecting their quality. This chapter specifically examines the effect of physical changes on the quality of dry and frozen food products.
Is cooking of vegetables chemical change?
Cooking of food is a chemical change as it involves the change in the composition of the food. After cooking, the raw ingredients of the vegetables cannot be regained.
How food is heated during cooking?
Radiation heat transfer occurs when microwave (light waves) or infrared energy (heat waves) are spread into the food. As the microwaves penetrate the food, they bump into molecules of water and fat, causing them to vibrate rapidly. This vibration creates friction, which creates heat that cooks the food.
What are 5 chemical changes?
The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
What is an example of physical change in cooking?
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.