* Shape: Pizzas can have various shapes, but they are typically round.

* Size: Large pizzas can range from 16-20 inches in diameter, while personal pizzas are usually around 8-10 inches.

* Color: The appearance of the pizza crust depends on the type of flour and cooking method. It may have a beige, golden brown, or reddish-brown coloration.

* Texture: The texture of the crust can vary based on the dough preparation and cooking. The crust can be crispy, soft, or chewy.

Chemical Properties:

* Melting Point: The melting point of pizza is not a definite value since it's a combination of different ingredients. Different cheeses may melt at different temperatures. The cheese will typically start to melt before the other toppings.

* Taste: Pizza's taste is a complex combination of flavors resulting from the interplay of ingredients such as cheese, tomato sauce, meat toppings, vegetables, and herbs.

* Odor: The characteristic aroma of pizza is primarily due to the combination of cooked dough and melted cheese.

* Flammability: Pizza is generally not considered highly flammable, but the oil from the cheese or toppings may catch fire if exposed to sufficient heat.

Remember that these properties can vary depending on the ingredients used, cooking methods, and recipe variations across different regions and styles of pizza.