Question

Water molecules are polar molecules. What is meant by the term polar molecule?

a molecule that has an overall positive charge on one end and an overall negative charge on the other end
a molecule that has no charge on one end and either an overall negative or positive charge on the other end
a molecule that has an overall negative charge on one end, as well as an overall negative charge on the other end
a molecule that has an overall positive charge on one end, as well as an overall positive charge on the other end