Historic westminster abbey in london, england, has been damaged by the sulfur dioxide and nitrogen oxide in acid rain. this is an example of chemical weathering, biological weathering, physical weathering.

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.

In an oxidation-reduction reaction, oxidation is what happens when a reactant

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!