Explain how tectonic plate movement could create another supercontinent like pangaea
(and one thing on picka subject were is science )

Asample of the male sex hormone testosterone, c19h28o2, contains 3.88×10^21 atoms of hydrogen.(a) how many atoms of carbon does it contain? (b) how many molecules of testosterone does it contain? (c) how many moles of testosterone does it contain? (d) what is the mass of this sample in grams?

What provides structure to the human body?

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?