Short Response/Illustration (12 pts): 19 19. Iron (IM) Oxide, Fe, o. commonly known as rust is a chemical compound. Is rust an ionic or
covalent compound? What is the charge of the iron (Fe) atom(s) that forms an ionic bond with the
Oxygen (O) atoms? Explain your answer.

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

How does a large body of water, such as the ocean, influence climate?