11. Water molecules have 2 poles-a negative pole and a positive pole. This is because​

the earth also has two poles

Explanation:

Now think about a magnet. Magnets have both a positive (+) pole and a negative (-) pole. So do batteries. So does the Earth. When things are different at each end, we call them polar. Some molecules have positive and negative ends too, and when they do, we call them polar. If they don't, we call them non-polar. Things that are polar can attract and repel each other (opposite charges attract, alike charges repel). The two magnets in the image above will attract because their opposite poles are near. Reverse one of them and they will repel each other.