Swel
What is a mixture?

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

An observation that requires measurement is called quantitative observable or qualitative

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize