1. Tides

2. What is a Tide?
A tide is the rise and fall of the sea level

3. The gravitational pull of the Moon and the Sun make the tides.

4. The Sun is so much larger than the Moon but has about ½ of the power compared to the Moon on tides…WHY?
The Moon is closer to Earth

5. The Types of Tides:

6. 1. Spring Tides
The Sun, Moon and Earth are in a straight line.

7. 1. Spring Tides Come once every two weeks.
During a full and new moon phase

8. Spring Tides
Highest High Tides and Lowest Low Tides
Why?

9. Gravitational Force – the force that pushes towards the center of rotation
Centrifugal Force - the force that pushes a body away from the center of rotation.

10. 2. Neap Tides
When the Sun, Moon, and Earth are at right angles.

11. 2. Neap Tides Happens about twice a month
Happens at the 1st and 3rd quarter Moon Phase

12. 2. Neap Tides Tidal Range is the smallest.
Lowest High Tides and Highest Low Tides
Why?

15. Now For a Brain Pop on Tides

16. Tidal Cycles
There are 3 different tidal cycles; this is how many high tides and how many low tides there are per 24 hour period

17. Tidal Cycles – 3 types

18. 1. Diurnal Tidal Cycle One high tide and one low tide per 24 hours
Uncommon – areas near Gulf of Mexico

19. 2. Semidiurnal Tidal Cycle
Two identical high tides and two identical low tides in one tidal cycle
east coast of USA

20. 3. Mixed Semidiurnal Tidal Cycle
2 High and 2 Low tides – all of different heights.
West coast of USA