10 POINT
I WILL MARK BRANLIEST PLSS HELP
Plants have played a role in affecting the Earth system by:

I. changing the composition of the atmosphere
II. changing the quality of the soil
III. weathering rocks
IV. altering the length of a day
A.
II and IV only
B.
I, II, and III only
C.
III and IV only
D.
I only

about what?
have a good day

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.

The answers to this question are as following: -increase the sample size from 6 cups to 12 cups of sand and water.-use more precise digital thermometers-use more precise scales that measure to the hundredth of a gram

You can just look up the questions individually and get the answers