4M Green Science Potato Clock Manual

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G . F u R T H E R E X P E R I M E N T S

Put some soft drink into the pots provided. Insert the

copper and zinc plates into the pots, as shown in the

diagram, taking care that the metal plates do not touch

each other. The clock should now start to work. You may

experiment with different liquid like salt water, fruit

juices; or fruit like lemon, orange, tomato etc. The fun

is unlimited.

H . F u N F A C T S

• The copper and zinc strips are called electrodes, and the potato is called an electrolyte.

• The potato battery works in the same way as the batteries used in electrical and electronic devices, such as torches,

radios and MP3 players. These batteries all contain different chemicals that produce electricity.

• Fruit and vegetables work well too. They contain plenty of particles that allow current to flow between the metal

strips.

• Battery types are named after the chemicals used inside them. Common types are zinc-carbon, nickel metal hydride

(NiMH), nickel cadmium (Ni-Cad).

• The chemicals in a battery are used up as the battery provides electricity. When no chemicals are left, the battery

is dead.

• Some batteries can be recharged when they are dead. Feeding electricity into a rechargeable battery reverses the

chemical changes inside the battery that happen when it produces electricity.

• The first battery was made by Italian scientist Alessandro Volta (1745-1827). He built a pile of metal discs with

card soaked in salty water between them. It produced a small electric current. The battery is now known as a Voltaic

pile.

• A fuel cell is a special type of battery. It produces electricity by the reaction between two chemicals. For example,

a hydrogen fuel cell produces electricity from the reaction between hydrogen and oxygen, which produces water. The

chemicals are constantly fed into the cell, so it never runs out.

• A non-rechargeable battery can't be recharged. Never try!

• Batteries contain some dangerous chemicals. Never open them up or cut them open, and always try to dispose of

them properly at a recycling centre.

• Copper is a very good conductor of electricity. It is used to make wires and cables.

• Zinc is used to galvanise steel objects such as garden tools and screws. The objects are coated with zinc, which

protects the steel from rusting.

I. QUESTION AND COMMENTS

We treasure you as a customer and your satisfaction with this product is important to us. In case you have any

comments or questions, or you find any parts of this kit missing or defective, please do not hesitate to contact

our distributor in your country, whose address is printed on the package. You are also welcome to contact our

marketing support team at Email: [email protected], Fax (852) 25911566, Tel (852) 28936241, Web site:

WWW.4M-IND.COM

A . S A F E T Y M E S S A G E S

To Parents: Read all instructions before providing

guidance to your children.

1. Please read through these instructions before you start.

2. Adult supervision and assistance are required at all times.

3. Intended for children of ages 8 and up.

4. This kit and its finished product contain small parts which may cause choking if misused. Keep away from

children under 3 years old.

5. Metal parts may have sharp edges. Adult assistance is required when assembling these parts.

6. Do not connect any of the parts provided to any AC wall socket or any batteries. This may cause electric shock or

a short circuit.

7. The LCD watch may temporary lose its function at electrostatic discharge environment, but it resumes its normal

function by resetting the device.

B . C O N T E N T S

Digital clock with wires

Transparent tapes

WARNING:

CHOCKING HAZARD

- Small parts.

Not for Children under 3 years.

Copper and zinc strips

Pots

Connecting Wire