Stage 3 Science-sational!

Science under investigation!

Rips and currents occur more frequently under certain conditions

I am writing this letter to you so that you can know what I have learnt this Term. My Hypothesis is: rips and currents occur more frequently under certain conditions.

I have found a couple of amazing facts.

  • The world’s fastest Olympic swimmer can’t beat a rip. The rip the can travel up to 1-2ft per second
  • The UNSW (UNIVERSTY OF NEW SOUTH WALES) as a part of a research project showed that about 60% of beach going Australians can’t spot a rip. It would be closer to 90% for foreign people.
  • 90% of rescues in the surf are related to rips and currents.

I have done 3 key questions:

  1. How do rips and currents form?
  2. Where are the world’s most dangerous rips and currents?
  3. How can you identify rips and currents?

Here is some research:

Rips and currents form naturally when a wave pushes water onto the shore. A longshore current picks the water that flows out to sea. The world’s most dangerous rips and currents are in the southern part of California and Hawaii. 80-90 people die each year in surf related to accidents due to currents. The nature of rips and currents forming depends on the swell on that present day. There is always a rip or current at the beach. The only exception is if a beach is not pointing out to sea but in a cove, like Pittwater for example.

By Jordan

September 18, 2009 - Posted by | 6H

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