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Chocolate

VIEWS: 43 PAGES: 32

									 Chocolate
Riches from the
  Rainforest
What is not to like about
      chocolate?
It is not surprising that there are
  so many chocolate goodies…

What IS surprising is the story of
        chocolate itself.
All Chocolate comes from the
        Cacao Tree
   The seeds go through many
changes on the way to becoming
a candy bar, but it all starts in the
      tropical rainforests…
•
The Cacao Tree needs…

           20o C + temps

           190 cm + rainfall

           Shade

           High Humidity

           Special insect
             pollinators - midges
Cacao trees often grow near a
   mother tree for shade.
              Bottom Line
Cacao can only be grown in the rainforest.
If humans continue to cut down
   rainforests and destroy the
  ecosystem there, we will no
          longer have

       CHOCOLATE.

           Yikes!
So how does it get from the
 rainforest to being actual
        chocolate?
Oval cacao pods are shaped like
   deflated, green footballs.
They start green, then turn
blazing red as they ripen.
The pods grow from the leafy
branches as well as the trunk.
Split the pod open and look
          inside…..
Dig deeper still….
The beans inside look like white ,
       squishy almonds
   Who figured it out?
Ancient Central Americans
        (Mayans)
 Mayan Hieroglyphics tell us…
• Cacao tree named
  for bitter seeds –
  caca

• Mayans drank a
  broth of the
  sweet pulp
Mayans revered chocolate
• Mayans
  offered
  chocolate to
  their gods
Cacao for the rich
         • In Mayan temples.
           Chocolate was
           served to kings and
           priests.

         • Chocolate
           symbolized vitality
           and riches.
  Aztec Hieroglyphics tell us…

• Cacao beans used for currency

• Aztecs did not grow their own cacao trees,
  but massed large “banks” of seeds from
  trading with neighbors to the south.

• Montezuma and his guards drank 2,000 pots
  of chocolate per day
  Aztecs also revered chocolate
• Offerings of cacao
  were made to the
  gods
• When Cortez
  arrived, the Aztecs
  thought he was a
  god, so they gave
  him chocolate.
Cacao for the Conquistadors?

              • Received mixed
                reviews, but was a
                source of nutrition

              • In Spanish, caca
                means….

              • Taste some cocoa
    Chocolate comes to Europe
• During the 1700’s,
  cocoa houses started
  popping up all over
  Europe.
• Now adding
  considerable amounts
  of sugar and other
  spices.
• Fashionable
 Enough of history, lets get down to
                the
                making
                       of
     CHOCOLATE
Hershey Virtual Tour
Let’s review what we know
about chemistry so we can
get down to the business of
     making chocolate.
     Physical Properties
• Facts about a substance that can
  be observed mainly with the
  senses.
• Examples are color, texture,
  taste, phase, boiling point, and
  density.
     Physical Changes
• When a substance changes form
  or shape.
• When a substance changes
  phase.
• Substance still has the same
  chemical identity.
    Chemical Properties
• Facts that describe how a substance
  reacts with other substances.
• Sometimes these can be observed
  with the senses – eg. copper
  changing color after reacting with
  water.
     Chemical Changes
• When two substances react with each
  other and form chemical bonds to
  become a NEW substance.
• Often occur because of added heat /
  energy
• Color change or change in smell
  usually indicate a chemical change.
Process your own chocolate

								
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