On a weather map, isobars that indicate strong winds.

a. are far apart

b. are part of a loop

c. are close together

d. cross one another

All living organisms are composed of a. only one cell. b. at least 100 cells. c. at least three cells. d. one or more cells.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

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.