How might the government make sure scientific research is done in an ethical
way?

How are the terms group and period used on the periodic table

Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?