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|TCode||TACtivity Name||TACtivity Description||Packs|
|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 4||PACK OF 10|
|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.|
|CC10||Fire Extinguisher Model||Fires kill more than a hundred thousand people every year worldwide. The numbers would be far higher were there no fire extinguishers and fire persons to deal with them. How are they extinguished? What can be done to save more lives, if help is not near at hand? Fire requires 3 key ingredients: material to burn, oxygen and an initial temperature high enough to ignite the material. Take any one of these 3 out, and you have yourself a potentially effective fire extinguisher. In this experiment, we produce carbon dioxide using a classic reaction, and use that to douse a candle flame by literally “pouring” it over the flame.|
|PL20||DIY Microscope||A microscope is an instrument used to observe very minute/small objects that are not visible to the naked eye. It consists of a diverging (convex/biconvex) lens, which enlarges the small objects to make it visible to the human eye.
In this TACtivity, we will make a microscope using glass beads (which act as the biconvex lens) and explore it by adjusting its focus to get a clear image and viewing some interesting objects.
|BP13||Microscope – Epidermal Cells||The onion peel is so fascinating because with your bare hands, you can easily peel off a unicellular layer from this very tasty stem vegetable. This peel can then be placed on a microscope slide and “stained”, so that you may observe the wonderful brick-like structure of onion plant cells through your own DIY Microscope|
|PF31||Trolley Model||Newton’s Second Law of Motion talks about how the net force acting on a body is directly proportional to the mass of the body and acceleration it experiences.|
In this ingenious TACtivity, we use our own Hand Cart to conduct a series of experiments to discover for yourself the relationship between mass and acceleration
|PACK OF 6|
|PF12||Paper Projectile||What is the path of an object when it is launched? Does it depend on the initial speed of the object? What about the angle of launch? We observe this and much more in this TACtivity. Using a piece of fat straw, a launch-angle measuring device called a sextant, and some paper darts, we launch the paper darts by blowing them through the straw to see what impact they make on a newspaper screen!|
|PF03||Thread Climber||Friction is a retarding force, always opposing the relative motion, between any two surfaces. In this TACtivity, we use friction to create a “climber”, with the help of straw pieces, some thread and a cardboard cutout.|
|PS09||Vibrating Membrane Model||Sound is produced when an object vibrates fast enough to agitate particles around it, which then transfer that energy to adjacent molecules to create a pressure wave in a given medium. Not only does sound need a medium to travel, there needs to be an impetus to cause a disturbance in the medium to manifest itself as sound.
In this joyous TACtivity, you make your own Bugle, using a balloon as the vibrating membrane and attaching it to different lengths of PVC pipe to create sounds of beauty and wonder!
|CC36||DIY Electroplating||Electroplating is a process by which one metal surface is coated with another, and this is done for various possible reasons, e.g. aesthetics, to prevent rusting etc.
In this lovely TACtivity, we use the process of electrolysis to coat an iron nail with copper as both these electrodes are dipped in a copper sulphate solution and exposed to an electric current using a AA cell.
|PM15||DIY Battery Holder||Regular electrical cells available in the market are typically 1.5V. However, several appliances need a larger voltage to work. Even LEDs need a minimum of 1.9V to light up. This requires connecting 2 or more cells in series. To do this in a robust manner, one needs battery holders.
In this TACtivity, you make your own 2-cell battery holder using a foam piece, some metal strips and electrical wire.
|PL06||Explore Optic Fibre||Optical fibres use a phenomenon known as total internal reflection to allow light to travel along a curved path. The light itself never actually bends, instead, it’s reflected off the internal walls of the fibre. As long as the angle of reflection of the light is greater than what is called the critical angle it will travel quite far without much loss. Thus it’s used as a way to send light (with coded information) over huge distances for communication and data services.
Here, you explore the properties of optic fibres by building a simple circuit, and connecting it to LEDs, which are shone through optic fibres and straws. Is there a difference?