Iraq is located on the continent of Asia. It is a part of the Middle East, a region of Asia and North Africa that nurtured some of the oldest human cultures on the planet. Continue Reading
salt is a pure substance because it is created using natural products that were drawn from our environment. in the refining process, there are no chemicals or other new substaâ¦nces added to the original products that would make it a mixture.
Lesson Summary. 1  Matter can be classified into two broad categories: pure substances and mixtures. 2  A pure substance is a form of matter that has a uniform composition and properties that are constant throughout the sample. 3  Mixtures are physical combinations of two or more elements and/or compounds.