Answer:
They test or measure something.
Explanation:
Primary research articles report on research that has been completed. Therefore, a primary research article will review and analyze studies, and will state the research question and hypotheses of the studies presented. A primary research article does not test or measure anything, but will report on studies that do.
the nitrogen cycle involves decompisition. and the waste from the animals is then turned into nitrogen.
Answer:
you wanna know what that is its atoms lots and lots of atoms and if you want to learn about something smaller than an atom learn about quantum physics
Explanation:
400x because you have to multiply that 40 by that 10