Olive oil is fairly dense and also pretty thick.
No
Cooking oil can be turned in to a solid by heating it. Once the cooking oil is heated let it cool down. As the cooking oil cools it will soon solidify.
No we should not put the stuff in the freezer as soon as we cook because it can change the temperature of the freezer.
Yes, cooking oil is made out of oil.
Oil does expand when heated and contracts when cooled.
cooking oil
Jews use oil in cooking for the same reasons that anyone uses oil in cooking.
They don't. If you freeze them they will expand and break
The main advantage is to re-use (re-cycle) the cooking oil again, which saves having to buy new cooking oil. Though, eventually, new cooking oil will be needed to replace or top-up old cooking oil lost to evaporation, or cooking oil tainted with a strong smell, possibly from cooking a lot of smelly fish.
Mineral oil should NEVER be used for cooking. It is a petroleum byproduct, not a food-based cooking oil.
Because margarine is a fat as is the cooking oil.