Ancient plant found in lake bottoms provides scientists with evidence about ancient climates.

Which of the four major uses is predicted to change the least by 2020?

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?