It must have a definite chemical formula that accurately represents all its parts.
• It must not originate from living organisms.

Will give ! ! widentify the advantages and disadvantages of renewable and nonrenewable energy resources.

How far down have geologists drilled holes ? (science) a: 3.8 km b: 12 km c: 100 m d: 1200 km

Afive-year study was carried out on a population of algae in a lake. the study found that the algae population was steadily decreasing in size. over the five-year period this decrease most likely led to