4. what is meant by the fact that water is a "polar" molecule?
a. water has a slightly negative charge overall
b. water has a slight negative and a slight positive charge at opposite poles
c. water has a very evident charge, but only in a gaseous form
d. water has a slightly positive charge, but only as a liquid

Hello!

A polar molecule is where one of the atoms in a molecule has a slight positive charge, and another has a slight negative charge, due to the unequal sharing of electrons.

Water is one of these molecules - the electrons spend more time around the oxygen atom in the center, and less around the hydrogens, so the hydrogen atoms have a slight positive charge, and the oxygen a slight negative.

Therefore, your answer is B, water has a slight negative and a slight positive charge at opposite poles.

Hope this helps!

b. read the phase at the intersection of any given temperature and pressure.

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.