Steps for Experiments

Water-powered light

Materials needed:3 bottles/cups of water
Light tower with light installed
3 zinc and 3 copper plates
Vinegar

Instructions:1-Fill the bottles with water
2-Add vinegar to the water
3-Connect LED light on the tower to a pair of zinc and copper plates(1 zinc and copper plate in each bottle)
4-Insert the zinc and copper plates into the water bottles/cups . Make sure the plates do not touch each other as this will cause a short circuit and the LED lamp will not light up .

Noise producing sound-chip

Materials needed:2 zinc and copper plates
2 Potatoes
2 wires(positive and negative terminal)
1 coin and sound chip installed

Step 1:

Connect the black wire form the LCD watch which is the negative side to one of the zinc plates by carefully threading the wire's exposed metallic end through the hole on the plate.

Step 2:

Repeat step 1 with the red wire which is the positive side.

Step 3:

Assemble a "connection pair" by connecting the other pair of copper and zinc plates with a connection wire.

Step 4:

Once all the components are connected, pierced the plates into the potatoes. each potato must have a copper and zinc plate.

Theories:-

There are universal standards for positive and negative terminals. the positive terminal is always the red coloured wire whereas the negative terminal is always black. Always connect the negative terminal to the zinc plate which is more reactive than copper and the positive terminal to the copper plate which is less reactive than zinc. it is important that the exposed wire and the plate touch.

Acidic materials are more reactive and are better conductors of electricity than Alkaline materials . They react with the electrons in water and thus the light is able to be operated .