Is it the end of the first term already?






 






Pictures courtesy of Bev Hayes






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Dancing Spaghetti

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Materials Large beaker 150ml graduated cylinder 50ml cups of vinegar 2 tsp baking soda 50ml water  8-10 sticks of broken spaghetti. Food colouring  Procedure Fill the beaker with water  Measure and pour 100 ml of vinegar into the beaker. add the food colouring - if needed Add two tablespoons of baking soda to the water and mix thoroughly. Put eight to ten pieces of broken spaghetti in the beaker and wait until the spaghetti settles to the bottom. A chemical reaction will take place, causing the spaghetti to move in the beaker.  Repeat experiment with different ratios of water, vinegar, and baking soda. Whats happening The noodles will bob up and down for several minutes. This noodle “dance” is captivating to watch. Since the surface of the noodles is rough, tiny bubbles of carbon dioxide gas are attracted to it. These bubbles increase the volume of the noodle substantially, but contribute very little to its mass. As a result, the...
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Explosion boxes

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Box example Explosion Boxes If you love pop-ups – those playful, joyful constructions that bring books and cards to life –  then you will enjoy making “ explosion boxes .” These popular 3D paper crafts take pop-ups to a  whole new world. Like pop-ups, “explosion boxes” offer an engaging way to invite students into the world of  math and engineering. They encourage students to explore and work with measurement, parallel  and perpendicular lines, angles, triangles, symmetry, and transformational geometry, all in the  context of engaging students to design and make themselves. Although the deepest learning comes when students design from scratch,  The simple explosion box shown here is designed to enclose a small Valentine’s Day treat, gift, or note.  It can be printed first and then cut, or cut without printing from coloured card stock or plain white paper  that students decorate themselves. Box Example ...
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ICY CHRISTMAS TREE

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How many ways can you engineer a Christmas tree! This  icy Christmas tree STEM project  was super fun. We had a great time piecing together this icy Christmas tree before it melted.  Materials Different size containers  Water Food colouring Tinsel {optional} Procedure Freeze water in each of the containers.  Mix in green food colouring and add tinsel for a  more festive look. You can also dump in glitter and other Christmas themed objects for melting out later!  Next, prepare a surface for the icy tree parts. Use a large cookie sheet and put some parchment paper down. A sturdy piece of cardboard could also work. You may want to transfer to a bin after if you want to melt the ice with warm water. When frozen, remove the ice blocks and get started. You can put on gloves if you want to. Try squirting a bit of warm water will help set them in place better. This can be tricky, so you have to work on creating a stable base an...
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