1. The Moon

2. How does the moon affect us, here on Earth?
TIDES!!

3. Tides Daily changes in the level of ocean water Influenced by the moon
Affected my moon’s gravity
Depend on the moon’s position relative to the sun and Earth

4. Tides Daily changes in the level of ocean water Influenced by the moon
Affected my moon’s gravity
Depend on the moon’s position relative to the sun and Earth

5. High Tides
Moon’s pull is strongest on the part of the Earth directly facing the moon and on the side of the Earth opposite the moon
Water “bulges” toward the moon and on the opposite side of the Earth
Water levels are higher
Occur every 12 hours, alternating with low tides

6. High Tides

7. Low Tides
Moon’s pull is weakest on the sides of the Earth that are not in line with the moon
Water is drawn away from the area between high tides
Water levels are lower
Occur every 12 hours, alternating with high tides

8. Low Tides

10. How often do tides change?
Tides change every 6 hours, as the Earth rotates on its axis
Ex:
12am High tide
6am Low tide
12pm High tide
6pm Low tide
12am High tide, etc…

11. High Tide
12:00 PM
6:13 PM
Low Tide

12. Spring Tides Occur when the sun, Earth and moon line up
Have the largest daily tidal range
Occur every 14 days, during the new and full moons

13. Neap Tides
Occur when the sun, Earth, and moon form a 90* angle to each other
Tides with the smallest daily tidal range
Occur every 14 days, during 1st and last quarter moons

14. How often do tidal ranges change?
Tidal ranges change every week, as the moon revolves around the Earth
Ex:
New moon =
Spring tides (week 1)
First quarter=
Neap tides (week 2)
Full moon =
Spring tides (week 3)
Last quarter =
Neap tides (week 4)

15. Tidal Energy

16. Tidal Energy

17. Tidal Energy

18. Importance of Tides Tidal energy can be used to generate electricity.
The tides help get edible sea animals to shore.
The tides can help cool coastal areas.