As a freshwater kid who rarely gets to the ocean, I think that tides are just awesome. That's why I was excited last week when I stumbled upon this very cool collection of low and high tide comparison photos from around the world.

I'm always amazed at how much of a difference there is between low and high tide.

Tide comes, in tide goes out. You can't explain that.

If you are this guy, I've got a pile of resources that will help explain how tides work so that even a 6 year old will understand. Download your free teaching resources here.

Published in General News is a very interesting tide and current visualization program that you should check out. It’s built by the guys from Nomad Electronics who made Pocket Stars astronomy software.

Deep Zoom is a very cool mash-up using Bing Maps and the NOAA nautical charts. By tapping into the NOAA database of tide and current tables, you can see right away what’s going on in your area. The author of the program has made it very clear that it’s strictly a reference tool and not for navigation so don’t use it when pulling into the harbour with your ocean liner.

If you are wondering what the giant arrow is in the middle of the capture, it’s for Deception Pass in Washington State which was maxing out at 7 knots (14km/h).

(Turn the sound down and jump ahead to the 5 min mark. It gets a lot more interesting there.)

The site does require Silverlight to be installed on your computer so it might not work on all work computers (especially if you have a very conservative IT department like my work...).

Published in Websites

Low Tide Turnagain Arm

If you are like me there is a very good chance that you struggle to explain to your students the basics of how tides work.

To help solve the mystery, the gang from Minute Physics produced a very cool video that explains the basics so simply that that my 10 year-old could understand.

Also, if you have also got an extra minute why don’t you learn why some rocks on the shoreline are round while other rocks are flat and perfect for skipping across the water.

Who knew that gravity affected our lives so much? I didn’t.

Flickr Photo Credit: Low Tide Turnagain Arm / Travis / CC BY-NC 2.0

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