Why is the bottom of the other shoreline cut off?
My dad keeps asking me about a claim I made in my post about the curvature of the Earth: That looking at sea level across a 500 m wide part…
Tag: RZ2015
Wave train
When you look at waves, do you sometimes notice the train of smaller waves being pushed forward by the “main” wave? That has always fascinated me. Kind of like in the center of…
Amplifying waves
A pier full of sail boats, perpendicular to the prevailing wave direction, and voila: Instant demonstration of an amplified wave! Look at how the masts show a transversal wave: Maybe…
Waves on a slope
Earlier this year at Forscherfreizeit Ratzeburg – the summer camp at which Conny, Siska, Martin, a bunch of teenagers and myself spent a week sailing, exploring and playing with water –…
Interference of waves
The advantage of wind-less days on a sailing holiday is that you can play with water as much as you like. For example in order to look at the interference…
On buoyancy
This is an experiment that Martin brought to Ratzeburg and that he let me use on my blog: Using a beam balance to talk about buoyancy. So at first we…
Sink or swim – experiments using tin foil
A pet peeve of mine are books on handcrafts or experiments or any kind of activity that come with drawings instead of pictures, because I always suspect that it was…
Creating eddies
I always love watching paddles in water, or ships in water, or ducks in water, or anything water, really, but on a wind-less day in Ratzeburg, Siska managed to create…
Playing with a model steam boat
I’ve shown this steam boat before, but I thought you might appreciate it in its full glory on the lake in Ratzeburg. Plus this time round, in the movie below,…
Curvature of the Earth
In Ratzeburg, we very much enjoyed our daily early morning swims. One thing that is really nice to observe when you are swimming in a calm lake is how things…
Tales of a science camp: 1. Forscherfreizeit Ratzeburg
Conny, Siska, Martin and myself just — we came back home only yesterday! — ran a summer camp for teenagers called “Forscherfreizeit Ratzeburg”. The idea was to combine a fun…
How to plan a course from scratch
Where do I even start??? A very helpful concept, which is completely contrary to how most people approach course planning, is “backward design”. Instead of looking at all the cool…