Transcript Agriscience_Lesson_on_tea

Tea
A lesson in Agriscience
and Horticulture Using
Southern Sweet Tea
Georgia Agriculture Education Curriculum Office
Catrina Kennedy and Dr. Frank Flanders
January 2006
Objectives:
Students will be able to:
1. Define terms associated with tea
2. Describe the tea production process
3. Describe different types of tea
4. Describe tannins in tea
5. Understand how solutes dissolve
6. Identify the genus and species of tea and other
related plants
Terms
Solution-process of forming a mixture
Saturated Solution-when something can no longer
be dissolved
Suspension-mixture which is finely divided that it
does not easily settle out
Oxidation-gain of oxygen
Tannins-naturally in tea leaves, over boiling causes
a bitter taste
Steep-soaking in water to release flavor
Adhesion-when things bond together
Surface Tension-property of liquids from molecular
cohesive forces
Different Types of Tea
Black Tea- normally what we
drink, it has been oxidized
longer, tends to have more
caffeine and a stronger flavor
Green Tea- least amount of
oxidation, can be found in the
local grocery store
Oolong Tea- the in-between
tea, it is brewed strong and
bitter but leaves a sweet
aftertaste
How tea is made
•Tea leaves are harvested
•Placed on racks in a climate controlled room where a process
known as withering takes place
•The withering process removes all the water from the leaves and
gives them a leathery feel
•The leaves are placed on rollers. This breaks up the leaves and
allows the release of juices
How tea is made
•The leaves are then
taken to a oxidation
room which contains
cement or glass
tables. This room
has a cool damp
atmosphere
•The leaves will turn
a copper color
•Leaves are then
placed in iron boxes
where they are
introduced to bursts
of hot air
*This is generally the process that black tea goes through
Tannins
Tannins are a chemical found in many plants. They are
important to the production of some items such as wine.
However, tannins are not necessarily a good thing when it
comes to tea. If you boil your tea for too long it will have
a bitter taste. This is because of the natural tannins in
tea. In making tea, it should be brought to a boil and
immediately removed from the heat.
An interesting fact about Tannins
Have you ever wondered why
water is clear in some areas but
dark in others? The reason is
because of Tannins. Rivers in
North Georgia are fast moving
so the organic matter doesn’t
have time to decay. In South
Georgia the water is slower
moving so plant material has
more time to decay.
Camellia sinensis v. Camellia
japonica
Camellia sinensis is
what is used to make
tea
Camellia japonica is what
is generally used in
landscaping. The only
difference between the
two is the species.
Making Sweet Tea
Step 1 Gather materials and equipment
*Pot
*Tea Pitcher
*Sugar
*Tea Bags
*Spoon
*Cups
*Ice
Making Sweet Tea
Step 2 Cooking the tea (based on 1 gal)
*Place 2 family sized tea bags in a pot of
cold water
Making Sweet Tea
Step 3 Bring to a boil and then remove
from heat. Allow it to steep for
approximately 1 minute. Remove tea bags.
Making Sweet Tea
Step 4 Add 2 cups of sugar to a pitcher.
Making Sweet Tea
Step 5 Add the HOT tea to the sugar and
allow the sugar to dissolve.
Making Sweet Tea
Step 6 Fill the remainder of the pitcher
with water and stir.
Making Sweet Tea
Step 7 Put ice into a glass and add tea
Making Sweet Tea
Step 8 Enjoy!
* This recipe should yield enough tea for 2 southerners or
137 northerners!
Making Sweet Tea-Cost per gallon
Tea Bags
$.33
Bag of Sugar
$.72
Total
$1.05 per gal
Making Sweet Tea-Quiz
1. What is the plant name that tea comes from?
A. Daisy
B. Bonsai Tree
C. Camellia
D. Eucalyptus
2. There are three types of tea, green, black and ______.
A. Purple
B. Brassy
C. Bold
D. Oolong
3. Which tea requires the least amount of oxidation?
A. Green
B. Black
C. Oolong
D. Brassy
4. How many years has tea been around?
A. More than 3000
B. Less than 100
C. 10
D. 500
5. What part of the plant is used to make tea?
A. Stem
B. Leaves
C. Roots
D. Flowers
6. What is the relationship between the Camellia plant that is used in landscaping and the one that is used for making tea?
A. Same plant
B. Taste
C. Species
D. Size
7. The only state that produces tea is _______.
A. South Carolina
B. Texas
C. Maine
D. Georgia
8. The type of tea that is most likely found and bought most often in the grocery store is _____.
A. Orange
B. Green
C. Oolong
D. Black
9. What is the last step is the tea production?
A. Harvesting
B. Drying
C. Cutting
D. Growing
10. Why should you not over boil tea?
A. Tea shrinks
B. Color change
C. Bitter Taste
D. Won’t dissolve sugar
Making Sweet Tea-Quiz
Matching
11. Solution
a. gain of oxygen
12. Saturated Solution
b. soaking in water to release flavors
13. Suspension
c. process of forming a mixture
14. Oxidation
d. when something can no longer be dissolved
15. Tannins
e. property of liquids from molecular cohesive forces
16. Steep
f. mixture is finely divided that it does not easily settle
17. Adhesion
g. over boiling causes better taste because of
18. Surface Tension
h. when things bond together
Making Sweet Tea-Quiz Answers
1.
C
2.
D
3.
A
4.
A
5.
B
6.
C
7.
A
8.
D
9.
B
10.
C
11.
C
12.
D
13.
F
14.
A
15.
G
16.
B
17.
H
18.
E