What is a substance that increases the hydrogen ion concentration in a solution.

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.

You see a white marker with an orange circle and black lettering. what does this marker tell you