Mass of HCI: Mass of solid:

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

Which of these properties, used alone, would be least useful in identifying most minerals? a. color b. luster c. streak d. density

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis