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|TCode||TACtivity Name||TACtivity Description||Packs|
|CC18||Reaction – Acid & Metal||Acids react with most metals to form salt and hydrogen gas. In this TACtivity, we react magnesium with citric acid to liberate some hydrogen gas. Inflate a balloon with the hydrogen gas and enjoy seeing the balloon float in air. Add a cotton thread to the bottom of the balloon and play around with the length of the thread to see the balloon go up and down.||PACK OF 4||PACK OF 10|
|CO02||DIY Multiple Test Tube Stand||Some experiments often require the use of a multiple test tube holder, useful for making comparisons and holding multiple test tubes side by side. Here, we make a test tube holder by making a loop using binding wire to hold the test tube and by wrapping the binding wire around an ice cream stick or any other object made from a poor conductor of heat. Make a slit in a foam base and insert the ice cream stick inside it to extend the test tube holder to a test tube stand. Add more slits and more test tube holders to make multiple test tubes stand next to each other.|
|CC08||DIY Base (B)||Commercially, sodium hydroxide is made through the electrolysis of brine solution. Here, we do the same, albeit on a much smaller scale, to make your own sodium hydroxide, the quintessential base, with hydrogen and chlorine as by-products.|
|CC21||Reaction – Metal Reactivity Series||The ability of a metal to react with other chemicals is an important property of the metal and is called its Reactivity. In this TACtivity we take three metals – Copper, Iron and Magnesium – with different reactivities and test their behaviour by placing them in copper sulphate solution|
|CC23||DIY Handmade Soap||Saponification is the soap making process, which uses the basic solution lye and different types of fats. The science behind soap making is in the structure of the fats, the properties of the lye, and the chemical reaction that produces cleaning molecules. Not only is it a process that uses science, but it’s also just a fun activity to make your own soap with the features that you want.|
|BM02||Respiration – Anaerobic||Yeast can respire even in the absence of oxygen – breaking down sugar, releasing carbon dioxide and other by products. Here, yeast is allowed to act on sugar water in a bottle, the mouth of which is sealed with a balloon. Over time, as the yeast starts to digest the sugar, the balloon starts to inflate! This process is called anaerobic respiration and is also used to make alcohol commercially.||PACK OF 6|
|BA05||DIY Stethoscope||A stethoscope is a medical instrument to listen to a patient’s heartbeat or breathing, and typically has a small disc-shaped resonator that is placed against the chest, and two tubes connected to earpieces. Here, we insert pipes in a cut ball and insert binding wire to the pipes to give them the shape of a stethoscope. Foam pieces are fixed at the other end of the rubber pipes to make the ear plugs.|
|BA33||Kidney Model||The kidneys’ job is to filter your blood. They remove wastes, control the body’s fluid balance, and keep the right levels of electrolytes. We use a Visking or Dialysis tube, a semi-permeable membrane, to understand the functioning of a kidney in this TACtivity.|
|BA06||Brain Model||The human brain is one of the most complex creations of nature, especially if one has to understand its finer structure. However, the brain can be divided into several segments, each responsible for a different function. Here, we make a paper mache model of the brain by sticking coloured paper pieces, depicting the different segments of the brain, on an inflated balloon|
|PL18||DIY Optic Bench||An optical bench is a versatile tool useful in conducting a series of optics experiments, involving lenses and mirrors. It is particularly useful when two or more optical elements need to be placed in a straight line and at a fixed level so that their optical axes align.
Here, we make our own Optical Bench using foam, skewers, straws and graph paper, and conduct various focal length experiments using lenses and/or mirrors.
|CC07||DIY Battery||The Voltaic cell was one of the first batteries to be invented and the principle behind its operation is still used in some modern batteries. A simple ‘wet’ cell consists of two metal plates, in this case magnesium and copper, separated by a liquid, in this case citric acid or baking soda solution. Known as the electrolyte, this liquid serves as a channel for balancing the charge between the electrodes when the cell is being discharged. Here, we connect the electrodes (magnesium and copper strips) to an LED, which lights up after the cells are dipped in the electrolyte.|
|PM06||DC Motor Model||This amazingly simple model of a DC Motor allows you to experience various facets of electromagnetism first-hand. The simple design and materials allow you to play with, experiment and tinker with this model and discover the properties of electricity and magnetism yourself. Current from the battery flowing through the copper coil makes it an electromagnet (Oersteds Law), which in turn interacts with permanent magnets, providing a thrust for the copper coil to rotate. All electric motors in the world work on the same principle. Here you make, play with, tinker and experiment with a brilliantly simple model first-hand.|