Let`S Talk About The Earths Tides

Uploaded on


  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads


Total Views
On Slideshare
From Embeds
Number of Embeds



Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

    No notes for slide


  • 1. Let`s Talk About the Earths Tides...
  • 2. Moon Phases...
    Supplied by: http://can-do.com/science/moonphases/Moonphases.gif
  • 3. Refresher Activity...
    • What do we remember about the Phases of the Moon?
    • 4. Fill in the Worksheet – Moon phases – you can discuss the with your neighbours.
    Moving On...
    • Tides – Movie Clip – “The Mysteries of Earths Tides.”
  • 5. Earth`s Tides...
    What are Tides?
    • Tides are the alternating rise and fall in sea level with and are produced by the gravitational attraction of the moon and the sun.
    • 6. Have a look at the picture below, it is the same Harbour at two different times of the day.
    High Tide Low Tide
    High Tide Low Tide
    Supplied by: http://ibbly.com/img/tides.jpg
  • 7. How does the Phases of the Moon effect the Tides?
    • The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon.
    • 8. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon.
    • 9. Ocean levels fluctuate daily as the sun, moon and earth interact.
    • 10. As the moon travels around the earth
    and as they, together, travel around the sun, the combined gravitational forces cause the world's oceans to rise and fall.
    • Since the earth is rotating while this is
    happening, two tides occur each day.
    Supplied by: http://www.dreamstime.com/royalty-free-stock-photography-earth-moon-sun-image4147287
  • 11. Are there names for the Tides?
    • Yes there are, for this lesson we are only going to focus on two:
    • 12. Spring tides
    • 13. Neap tides
    Supplied by: http://www.masters-of-photography.com/T/talbot/talbot_ships_at_low_tide_full.html
  • 14. Spring Tide...
    What is a Spring Tide?
    • Spring tides are especially strong tides (they do not have anything
    to do with the season Spring).
    • They occur when the Earth, the Sun and the Moon are in a line.
    • 15. The gravitational forces of the Moon and the Sun both contribute to the tides.
    • 16. Spring tides occur during the full moon and the new moon.
    • 17. Activity: Tides Worksheet – Spring Tide
    Supplied by;:http://www.happisburgh.org.uk/gallery/ronjames/Spring_Tide_Looking_SE.jpg
  • 18. Spring Tide...
    Supplied by: http://www.physicalgeography.net/fundamentals/8r.html
  • 19. Neap Tide...
    What is a Neap Tide?
    • Neap tides are especially weak tides.
    • 20. They occur when the gravitational forces of the Moon and the Sun are perpendicular to one another (with respect to the Earth).
    • 21. Neap tides occur during
    quarter moons.
    • Activity:
    Tides Worksheet – Neap tide
    Supplied by: http://www.flickr.com/photos/katebodger/3254443305/
  • 22. Neap Tide...
    Supplied by; http://www.physicalgeography.net/fundamentals/8r.html
  • 23. Conclusion...
    Supplied by: http://www.redfishpro.org/images/SpringTides.gif
  • 24. Group Activity...
    Mini Tide Experts
    • Class divides into four groups
    • 25. Each group will be given a different Moon Phase
    • 26. Each phase refers to a different Earth Tide
    • Design a poster of your moon phase and how it influences Tides on Earth.
    • 27. Short presentation to the class.
    Resources Available
    • Poster/butchers paper
    • 28. Marker pens
    • 29. Worksheet notes – Moon Phases and Tides
  • References:
    • National Oceanic and Atmospheric Administration. (2008). Tides and water levels. Retrieved from: http://oceanservice.noaa.gov/education/kits/tides/welcome.html
    • 30. Climate Science from the Southeast Pacific. (2008). Tides of the ocean. Retrieved from: http://www.windows.ucar.edu/tour/link=/earth/Water/ocean_tides.html&cd=falsel&portal=vocals&edu=mid
    • 31. Ignite Learning. (2009). The Mysteries of Earths Tides. Retrieved from: http://www.youtube.com/watch?v=aN2RM5wa1ek&feature=related