When using a glass/Pyrex dish the temperature of the oven is 25 degrees lower.
They can be, yes.
Cooking pans coated with foodsafe ceramics are fine as they hold the heat evenly.
You might get some in specialised stores, the cooking stores in cheshire oaks ellsmereport and T.K.max in the home department I don't think you can buy ceramic frying pans the heat would mean they would crack
It is metal because it absorbs heat and the heat heats up whatever you are cooking
Aluminium.
Such containers are known as pots or pans. Pans usually have a lower rim, and are made of metal, while pots are usually bigger, heavy pans which can be both metal and ceramics.
Copper pans are a lot more durable than ceramic pans. However, they are not as durable as steel pans.
Steel pans are actually more expensive as aluminum is one of the cheapest metal materials to use for cooking equipment. Steel is not too much more expensive as it isn't as preferred as its counterpart stainless steel.
aluminum stainless steel copper with a tin lining cast iron stamped steel that's coated in enamel
Cheap pans are usually made of aluminum because it is inexpensive. Other metals and materials are actually better and healthier for cooking in, but they cost more, which means the pans cost more.
because metal utensils can scratch the pans
They can be aluminium, steel, iron, stainless steel, the 'Teflon' is a non stick coating covering the cooking surface of the base metal.
Metal are mostly good conductors of heat