We conducted an experiment to test our hypothesis of how many water droplets can fit on the surface of a penny. We saw that the water piles up to form a round bubble. We learned that the water molecules stick together because of attraction between their positive and negative parts similar to tiny magnets. Each water molecule has one oxygen atom that carries a negative charge and two hydrogen atoms they carry a positive charge. One water molecule’s positive part sticks to another molecule’s negative part. This stickiness is called cohesion. Since water molecules are polar (they have a positive and negative side), these molecules attract each other. The attraction is called a hydrogen bond and hydrogen bonds make water molecules want to stick to each other. Then we played a math game where we had to add and subtract natural numbers.