1. Build a simple telescope:
- Materials: Cardboard tubes, magnifying glass, convex lens.
- Procedure: Assemble the cardboard tubes to create a long tube. Attach the magnifying glass to one end and the convex lens to the other end. Adjust the distance between the lenses until you can see a clear image of a distant object.
2. Investigate the effects of gravity:
- Materials: Stopwatch, ball, different heights.
- Procedure: Drop the ball from different heights and measure the time it takes to hit the ground. Use the data to calculate the acceleration due to gravity.
3. Build a solar still:
- Materials: Plastic sheet, bowl, salt water.
- Procedure: Place a bowl of salt water in a sunny location. Cover the bowl with a plastic sheet and weigh down the edges to create a seal. The water will evaporate and condense on the plastic sheet. Collect the condensed water and taste it to see if it is fresh.
4. Investigate the properties of sound waves:
- Materials: Tuning forks, string, weights, ruler.
- Procedure: Suspend a tuning fork from a string and attach weights to the string to change the tension. Measure the frequency of the sound wave produced by the tuning fork using a ruler. Use the data to investigate the relationship between the tension of the string and the frequency of the sound wave.
5. Build a simple electric motor:
- Materials: Copper wire, battery, magnet.
- Procedure: Wrap the copper wire around a nail to create a coil. Connect the ends of the wire to a battery. Place the coil of wire in the magnetic field of the magnet. The coil of wire will rotate, creating a simple electric motor.