#11: The Moon.

Did you know the suns gravity is only 34% that of the moons? That's why the moon controls our tides. People can predict the tides because they know which stage the moon is in in its cycle. and where abouts it is in relation to the Earth. The tides are always highest around midday because that's when the sun and the moon are directly opposite each other the most. That's also why the Earth isn't perfectly round - it warps at the sides, this is because the sun and the moon are pulling against each other and it affects the water. Now, I'm no scientist - it was a miracle I even passed my science class, I barely even studied geography either so I don't know if this is exactly right- my explanations might be a bit off and I'm probably missing a few details here and there but, in essence, I'm pretty sure this is relatively correct.