Questions
- What simple experiment can you perform to demonstrate the principle of air pressure using a glass, a piece of paper, and water?
- Which common household item can be used to create a chemical reaction that produces a bubbling, foaming effect resembling a mini volcano?
- What experiment involves using a balloon and a bottle to show how gases expand when heated?
- Which experiment demonstrates how a rainbow can be created using a glass of water and a flashlight?
- What is the name of the experiment where you can make a rainbow-colored flame using metallic salts?
- How can you create a simple electric circuit at home to light up a small bulb? Name the basic components required.
- Which experiment involves using a magnet and iron filings to visualize magnetic field lines?
- What experiment can you do to observe the reaction between baking soda and vinegar?
- Which simple demonstration shows how non-Newtonian fluids behave under pressure?
- How can you make a homemade lava lamp using oil, water, food coloring, and Alka-Seltzer tablets?
Answers:
- Place a lit match or a small candle inside a glass, cover it with a piece of paper, and then invert it into a tray of water. The paper absorbs air, and as it is pulled in, the candle goes out, demonstrating air pressure.
- Baking soda and vinegar react to produce carbon dioxide bubbles, mimicking a volcano eruption.
- Heating a balloon attached to a bottle shows gas expansion; as the air inside heats up, the balloon inflates.
- Shining a flashlight through a glass of water onto a white surface creates a rainbow effect due to refraction.
- The “fire rainbow” experiment involves burning metallic salts such as copper sulfate to produce colored flames.
- Connect a battery to a light bulb with wires to complete an electric circuit.
- Place iron filings on a paper over a magnet to visualize magnetic field lines.
- Add baking soda to vinegar in a container and observe the bubbling chemical reaction.
- Pour cornstarch mixed with water to create a non-Newtonian fluid that behaves like a solid under sudden pressure.
- Fill a clear bottle with water and oil, add food coloring, and then drop in Alka-Seltzer tablets to produce bubbling, similar to lava lamp effects.