Kids Science Website Review

My six year old and I were on a mission to find a kids website that we could learn more about science. We finally found one called Zoom by PBS kids. Click here to check this website out.  The newest one is the Saltwater Tester.

Materials

masking tape

  • 9-volt battery
  • buzzer
  • 2 Popsicle™ sticks
  • aluminum foil
  • water
  • saltwater

Instructions 

Check with a grown-up before you begin.

  1. How can you tell if water is salty? You could taste it – or you could use a saltwater tester!
  2. A saltwater tester uses electricity to tell you if water is salty or not. Here’s how to make your own.
  3. First, cover two Popsicle™ sticks with metal – the ZOOMers used aluminum foil.
  4. Then, get a buzzer – you can buy one at an electronics store – and tape the red wire of the buzzer to the positive end of the battery. The positive end will have a plus sign on it.
  5. Next, tape one foil-covered Popsicle™ stick to the black wire of the buzzer. Tape the other one to the negative end of the battery. The negative end will have a minus sign on it.
  6. You can see if your tester is working by touching the metal together. This will complete the circuit and make the buzzer buzz. If it doesn’t buzz, check your connections to make sure everything is taped together in the right way.
  7. Now to use your saltwater tester, put just the tips of the metal in saltwater, about an inch apart. Make sure the two metal parts don’t touch. The saltwater will act like a wire, connecting the metal sticks, completing the circuit, and making the buzzer buzz.

For more of these type of experiements click here.

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