A testosterone level test measures the amount of testosterone in the blood and is reported as nanograms per deciliter (ng/dL). It's also known as a serum testosterone test. - Google
Look at the water cycle, all water is connected through the water cycle
An element is made up of only one type of atom.
Answer:
The law of superposition states that rock strata (layers) farthest from the ground surface are the oldest (formed first) and rock strata (layers) closest to the ground surface are the youngest (formed most recently).
