Jan. 11-15

We started the week by learning about tides. The two kinds of tides that are affected by the moon are neap tides and spring tides. A spring tide is when the tide's range is at its maximum. In other words, the high tides are really high and the low tides are really low. This occurs when the sun, moon, and earth are in a line. Neap tide is when a tide's range is at its minimum. This occurs when the earth , moon, and sun form a right angle. We also learned about high and low tides. The reason it changes is because the earth rotates.

Then we did a simulation about the sun and seasons. We all came up with a bunch of hypotheses, and using the simulation, we went through the list, proving and disproving all of them. It turns out, we have seasons because of how direct the sunlight is on our hemisphere, not distance from the sun. The tilt and position in the revolution affect the orientation of the earth relative to the sun. Because of the earth's orientation, the sunlight hitting one hemisphere is more direct than the sunlight hitting the other. Summer is when the rays are directly hitting that hemisphere.