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|TCode||TACtivity Name||TACtivity Description||Packs|
|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.||PACK OF 4||PACK OF 10|
|CM02||DIY Centrifuge||A centrifuge is a device that uses rapidly spinning containers, to separate substances based on their density. The apparent centrifugal force pushes the denser materials to the extreme ends of the container while the less dense materials remain nearer the centre.
In this remarkable creation of Prof. Manu Prakash from Stanford University, we make a “centrifuge” using just cardboard, cotton thread, vials and a button. With one’s own hands, one can wind the thread and spin the cardboard at about 3000-4000 rpm, and easily separate certain colloidal mixtures, such as muddy water and even blood!
|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.
|CC14||Food Test – Protein||The food we eat contains various nutrients that are required by the body. One of these vital components is protein. Protein is one of the building blocks of life and essential in our diet. Using sodium hydroxide and copper sulphate, one can create a solution that is a good indicator to detect the presence of protein in a food substance. Here, we perform the test on a few daily life food items.|
|BP12||Microscope – Leaf Venation||Observing the veins on different kinds of leaves is a great way to not only appreciate how water and nutrients are transported in plants, but is also an effective tool in identifying plants and their types. In this TACtivity, you use your own DIY Microscope to observe leaf venations on all kinds of leaves|
|BA02||Body Joints – Ball Socket||Make a ball and socket joint using two balls of different sizes and a couple of joysticks. Understand how your shoulder joint works, and notice the expansive movements made possible by such a joint.|
|BA16||DIY Respirometer||Chemical reactions often create a change in colour. Here, we use a classic acid-base indicator to make a simple “respirometer”, which can be used to estimate your metabolic rate as you blow into a solution of slaked lime.||PACK OF 6|
|PL14||Law of Reflection||The Law of Reflection states that the angle of incident light is equal to the angle of the reflected light, with respect to the normal of the surface of reflection, and all three lines are on the same plane.
In this classic experiment, we use pins and a plane mirror to prove this Law.
|PL09||Light – Umbra Penumbra||Have you ever noticed that shadows sometimes have sharp edges and sometimes look blurred? What is the difference and why is this? When a light source is fully blocked out, the shadow is distinctly dark; this is called the Umbra. However, if a light source is only partially obscured, the shadow can look like any shade of grey, thereby giving you a blurry impression; this is called the Penumbra.
In this simple TACtivity, you use household materials to make an experiment where you can observe both these phenomena and make measurements to elucidate your understanding of shadows.
|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.
|PM16||DIY Switch||A switch is a mechanism that removes, restores or diverts the conducting path in a circuit when it is operated. In this TACtivity, using ice cream sticks, magnets and some electrical tape and wire, we are going to make a simple tap switch to make or break small DC circuits.|
|CP05||Matter – Electrical Conductivity||Electrical conductivity is the measure of the amount of electrical current a material can carry. A conductor is a material which allows current to flow through it easily whereas an insulator is a material which does not allow the flow of current through it.
In this TACtivity, we will set up a circuit using AA cells and an LED, to test the electrical conductivity of different materials used in our daily life.
|PM09||Magnetic Pen Stand||Magnets are among the most fascinating things in nature. They are fun to play with, and play an important role in our day-to-day lives. They can attract or repel each other, depending on their orientation.
In this TACtivity, we use a cycle spoke and a CD to make a stand to hang one magnet. The other magnet is fixed on the pen such that it prevents the pen from falling. Adding a colourful fan on top of the pen makes the pen rotate when there is a light breeze from the top or side.