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Spud's Kids' Page

Potato Jokes For Kids

Why did the potato cross the road?                 

He saw a fork up ahead.

How do you describe an angry potato?           

Boiling Mad.

Why didn't the mother potato want her daughter to marry the famous newscaster?

Because he was a common tater.

Why wouldn't the reporter leave the mashed potatoes alone?

He desperately wanted a scoop.

What do you say to an angry 300-pound baked potato?

Anything, just butter him up.

What does a British potato say when it thinks something is wonderful?

It's mashing!

What do you call a baby potato?

A small fry!

 

”The World’s Easiest Quiz?”

 

Kids give this test to an adult and start laughing! Don’t show them the answers until they’ve finished answering all the questions. I bet they won’t get more than one right! Before they start tell them you know the answers because you learned it in school.

 

Questions:

 

1) How long did the Hundred Years War last?

2) Which country makes Panama hats?

3) From which animal do we get catgut?

4) In which month do Russians celebrate the October Revolution?

5) What is a camel's hair brush made of?

6) The Canary Islands are named after what animal?

7) What was King George VI  first name?

8) What color is a purple finch?

9) Where are Chinese gooseberries from?

10) How long did the Thirty Years War last?

10) How long did the Thirty Years War last?

 

Answers:


1) 116 years, from 1337 to 1453.

2) Ecuador.

3) From sheep and horses.

4) November. The Russian calendar was 13 days behind ours.

5) Squirrel fur.

6) The Latin name was “Insularia Canaria” - Island of the Dogs.

7) Albert. When he came to the throne in 1936 he respected the wish of Queen Victoria that no future king should ever be called Albert.

8) Distinctively crimson.

9) New Zealand.

10) Thirty-years, of course. From 1618 to 1648. 

 

Regularly remind the adult, “Sometimes things are not as easy as they appear..”

 

 

How to make a battery with a potato 

Introduction:

 Batteries generate electricity through a chemical reaction between two different electrodes and one electrolyte. Use of Copper and Zinc electrodes and Sulfuric acid as electrolyte is a proven method for this process. We are wondering if we can use any other liquid as electrolyte? This gave us the idea of using a potato as electrolyte. After all a fresh potato has a lot of juice that may serve our purpose as electrolyte.

 Problem:

 Can Potato be used to generate electricity?

 Hypothesis – another word for guess:

 Potato juice contains many water-soluble chemicals that may cause a chemical reaction with one or both of our electrodes. So we may get some electricity from that.

  Material:

 For this experiment we use:

A fresh potato

Copper Electrode

Zinc Electrode

A Digital or Analog Multimeter to measure Voltage or Current of produced electricity.

Alligator clips/ Leads

 Procedure:

 We insert copper and zinc electrodes in to the potato, close but not touching each other. We use Clip leads to connect our electrodes to the Multimeter to measure voltage between two electrodes or current passing through the multimeter. For this experiment we removed the shell of a broken AA battery for our Zinc electrode. (Make sure to test your multimeter by connecting it's Positive and Negative wires to each other that should show no current and no voltage).

  A digital multimeter showed 1.2 volts between the electrodes, but the analog multimeter showed a much smaller value. In other words even though the voltage between electrodes is 1.2 Volts, the speed of production of electricity is not high enough for an analog multimeter to show the exact voltage.(Analog multimeter gets it's power from our potato to show the voltage, but digital Multimeter gets it's power from an internal battery and does not consume any of the electricity produced by our potato, that is why it shows a larger and more accurate value).
We repeated this experiment with some other fruits and all resulted almost the same. In all cases the produced voltage is between 1 and 1.5 volts, and in all cases they do not produce enough current to turn on a small light

Another thing that we learned from this experiment is that creating electricity and making a battery is easy, the main challenge is producing a battery that can continue to produce larger amount of electricity for larger amount of time. 

POTATO BATTERY

This activity uses a common potato and two different metals to make a enough electricity to run a small digital clock. Try this activity then attempt to expand on it to create a neat science fair project.

Materials:

bulletLarge Raw Potato
bulletPennies (2 ea)
bulletLarge Galvanized Nails (2 ea)
bullet6" long wire (3 pieces)
bullet Small Digital Clock (Radio Shack - "Stick-on Timer / $4.99)

The digital clock can be extracted from an inexpensive alarm clock or it can be purchased from an electronics store such as Radio Shack.

To Do:

  1. Cut the potato in half and place them next to each other, flat face down on a plate.
  2. Strip off about 2 inches of insulation from both ends of each wire.
  3. Wrap one end of one wire around one of the nails. Press the nail into one of the potato halves.
  4. Wrap one end of another wire around one of the pennies. Do this by first laying the penny across the exposed wire. Position the penny so it is centered on the wire and almost touching where the wire insulation begins. Fold the end of the exposed wire over the top of the penny. Pinch the penny and wire between your index finger and thumb on one hand and pinch the overlapping wire with the other hand. Twist the penny until the wire tightens around the penny. Press the edge of the penny about half way into the other half of the potato. We went one step further, we drilled holes in the pennies to make it easier to attach the wires.
  5. Attach one end of the third wire to the nail and the other end to the penny as in steps 3 and 4.
  6. Insert the nail into the potato that already has the penny stuck into it then stick the penny into the potato that already has the nail stuck into it.
  7. Pop the back off the timer and remove the button battery
  8. Connect the two wires coming from the potato battery to the contact on the battery holder. If the clock does not illuminate the polarity (+ / -) might be incorrect. Touch the wires to the opposite contacts on the timer's battery holder.

Electrodes

Potato Battery

How does it work?

The potato contains phosphoric acid. This acid causes chemical reactions to occur at each of the electrodes (galvanized nail and copper penny). The reaction at the copper electrode strips electrons from the copper and attaches them to the Hydrogen ions (2H+) in the phosphoric acid. This depletes the electrons on the copper electrode which makes it "hungry" for more. The process creates Hydrogen gas.

The galvanized nail provides the Zinc needed for the other reaction. The phosphoric acid dissolves the Zinc in the nail and liberates electrons from the Zinc atoms. The liberated electrons stay on the electrode and the resulting Zinc ions (Zn++) migrate into the acidic juices of the potato. This results in an excess of electrons on the Zinc electrode. If a wire is connected between the Zinc nail and the copper penny, electrons will flow. This flow of electrons is the electrical current that makes the digital clock function.

We hooked our potato battery to an oscilloscope and measured a voltage of 0.5 Volts. Several potato batteries can be connected in series to generate a higher voltage.

 
 

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Last modified: January 02, 2009