What forms when air moves upward where there is less air pressure

Used primarily for thickening sauces and soups, a (paste/roux/stock) is made from a (1: 2/2: 1/1: 1) fat and flour.

What percent of body heat can be lost through the head

Andrea's parents take her to a routine dentist exam. after examining andrea, the dentist applies a thin film on her healthy molars. what is this called?