A: According to BBC, an endoskeleton is a bone structure located in the interior of an animal, and an exoskeleton is a bone structure located on the exterior of an animal. Each type of skeleton has unique advantages and disadvantages in helping the animal survive.
Minerals made of only one element are called NATIVE minerals (i.e., silver, gold, mercury, copper). Minerals composed of compounds are simply referred to as minerals (i.e., quartz, which is made up on silicon and oxygen).
Unit 3 Elements Made up of only one type of particle called an Atom. Any substance that is made up of one type of particle is called a pure substance.An element cannot be separated into simpler substances by chemical or physical means Gold (Au) is an element.Each particle is the same.ame_________________ Period________________ Fill in the blank: 1. A pure substance is a substance that contains only one type of ___________________. 2. Characteristic properties can be used to ____________substances.