Newtons 3rd law

This video in my opinion was very useful as the man in the video shows real life situations in which he asks people questions about the gravitational pull between the earth and the moon, and despite these people knowing Newtons 3rd law (every action has an equal and opposite reaction) they still do not apply it to his questions. They think If an object has a greater mass it will has a larger gravitational pull, but i guess they just didn't fully comprehend Newtons law.

tides

Tide Resource.

 Each day the earth experiences 2 high tides and 2 low tides. They come 1 after the other and last for 6 hours each. For example if at 12am there was a high tide, at 6am there will be a low tide and at 12pm there will be another high tide and at 6pm there will be another low tide.

If a place in the earth is experiencing a high or low tide, the completely opposite side of the world will completely experience the same tide, this is due to the difference of the moons gravitational pull on the earths core. 

The tides have to be equal and opposite, or either the tides will not be able to form.

A spring tide is when the sun and moon are acting on the same sides of the earth and cause higher than normal tides, and a neap tide is where the sun and moon are affecting the earth on perpendicular sides and cause normal tides.