156 • Geography Convection chamber


Try our new convection chamber. Simple to use with very ex- planatory results. With this chamber it is easy to demonstrate how convection affects winds, high pressures and low pres- sures through the interaction of cold and hot air. The usually invisible convection currents are very easy to see when smoke from burning paper is added through one of the chimneys. The chamber and chimneys are made of durable acrylic glass and the bottom is comprised of an aluminium tray. Place a tea light on one of the circles on the tray.


2688.00 Convection chamber 2688.00


Deep sea currents model 7960.20 Supporting products:


7960.15 Heat element 50 W 3098.00 Food coloring set 8284.38 Red food color


Discover how the deep sea currents, such as the ocean con- veyor belt (the thermohaline circulation), flow with this new mo- del. The model is an excellent tool for illustration of the deep sea currents that are caused by variation in temperature and salinity. It is developed in cooperation with Danish High School teachers, and is a highly recommended tool for illustrating cur- rents in water. The model helps students to understand why warm sea waters can travel great distances and why cold wa- ter sink due to the increased salinity. The tank is made of acry- lic glass with one white side and three clear sides. The white side makes it easier to view the sea currents. A special com- partment for ice is located in one end and a heat element (not included) can be mounted in the other end. Food color is usu- ally added to the ice (cold region) to make the currents visible.


7960.20 Deep sea currents model


Gouge auger, 100 cm


With this rugged soil core sampler it is possible to extract soil samples from depths up to 100 cm. The total length of it is 112 cm with a sample length of approximately 100 cm. The diameter of the sample is 8 mm. The gouge auger is made from electroplated iron of great strength, and has marks for every 10 cm.


7680.08 Gouge auger, 100 cm


Gouge auger, broad opening The broad opening of this soil sampler makes it easier to in- spect the soil sample while it is still in the auger. Total length of the sampler is 63 cm long and it yields a soil sample of ap- proximately 49 cm in length with a diameter of 22 mm. Made from electroplated iron


7680.06 Gouge auger, broad opening 7680.06 7680.08


Passion for Science


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