What types of liquids conduct electricity? Does pure water conduct electricity? What if you dissolve salt in it? Or sugar? Here, we test the resistance of water by dissolving increasing amounts of salt in it. We give you a selection of materials to setup a simple electrical circuit – with batteries and an LED – to test the conductivity of different concentrations of saltwater based on how brightly your LED lights up! What is it in a liquid that makes it conduct electricity? Bonus: Fluid Pressure & Speed - Water Spray: Using two straw pieces connected perpendicular to each other on a piece of foam, you get to make your own water spray, a wonderful toy to play with and also observe tiny beads of water droplets! ThinkTac TACtivities use simple and accessible materials to develop scientific temper by observing physical realities, testing, hypothesising, questioning and analysing. Variations are designed to encourage tinkering, creating opportunities to apply logic, problem solve and think critically and creatively. All TACtivities are linked to the curriculum and help understand underlying science concepts, assisted by topic guides and videos. Our App provides access to step-by-step videos, interactive simulations, variation videos, topic guides, topic videos and exploration games for most TACtivities.
