Transcript File - eyeung-dp

Coffee
What is it?
By Paul Holtzman, Eric Yeung,
Rebekah Aramburo, Derric Mckinnie
Lesson Overview and Reflection
Product: Coffee
Essential Question: How can the
concentration of caffeine in coffee be
measured?
Coffee Bean Info
Some of the chemicals you find in coffee
include caffeine and amino acids,
carbohydrates, minerals, potassium. A lot of
these compounds are transformed during the
roasting of beans. Some of these components
of coffee are in fact completely destroyed
during the roasting process.
When you run hot water through ground
coffee, the chemicals inside are being taken out
by the hot water which then are moved into the
hot water creating a solution.
What is Caffeine?
A cup of coffee can help you stay awake.
Caffeine is a natural stimulant that you find in
leaves, seeds and fruits of over sixty different
plants around the world. It is the most widely used
psychoactive substance which means the change in
moods and distorted perceptions around the
world. Studies have proven that caffeine affects
your cardiovascular (blood and heart vessels) and
nervous system. It also increases the metabolism in
your body which leads to different effects on your
body, brain and heart. Drinking caffeine blocks
adenosine, a chemical secreted by the nervous
system to give the body a calming effect. At the
same time you get a shot of adrenaline giving you
the ‘fight or flight’ feeling. The result is your heart
rate rapidly increases, your muscles tighten and
extra glucose is released in your body for energy;
even your blood pressure increases. This is
commonly known as the ‘caffeine buzz’. Caffeine
even affects the cortex of your brain, keeping you
alert and increasing the intensity of mental activity
in your brain. But a lot of coffee can have its
drawbacks. Heavy caffeine users can’t get deep and
heavy sleep. Caffeine is addictive as it increases
dopamine giving you a feeling of pleasure and
happiness.
REFERENCES
“The Chemistry That Brews in Your Cup of
Coffee.” Everyday Chemistry. WATCONSULT.
Web. 13 Mar. 2013
Haines, Gail. “Brain Booster to Go?”
ChemMatters (December 2008); 6-9. Article.
Hill, David “Study Suggests Coffee Is Healthy,
Coffee Drinkers Are Not, Singularity Hub.”
Singularity Hub. Singularity Hub, 23 May 2012.
Web. 17 Apr. 2013.
Petracco, Marino. “Our Everyday Cup of Coffee:
The Chemistry behind Its Magic.” Jouranal of
Chemical Education 82.8 (August 2005): 1167167. Article.
Seppa, Nathan. “Coffee Gives Jolt to Life Span|
Body & Brain| Science News.” Coffee Gives Jolt
to Life Span. ScienceNews, 30th June 2012. Web.
17 Apr. 2013
Rebekah Aramburo is a 16 year old
sophomore at HTHI who recently awarded a
chance to study abroad.
Derric Mckinnie is a 17 year old sophomore
at HTHI that is interested in pursing music as
a career.
Paul Holtzman is a 16 year old student at
HTHI, that is on the school golf team.
Eric Yeung is a 16 year old student currently
enrolled in HTHI who is bilingual.
Activity: Making Coffee
Our demonstration is made for anyone who has an
interest in coffee and would like to know the chemistry
behind coffee. During the demonstration, the audience
should not interact with the demonstration until told to.
By using the coffee maker well be able to create the coffee
and make the coffee. Using the paper filter we’ll be able to see
how the extraction (taking apart) process works in the coffee
maker.
Materials
Coffee maker
Paper filters
Coffee beans
Hot water
Ground coffee beans
2 Cups
Description of Demonstration
Coffee pot/maker:
Insert coffee beans in coffee maker
Add water from the top into the coffee maker
Wait for coffee to pour into the pot
Pour the coffee into a cup
Coffee filter:
Attach the filter to a glass cylinder pot
Add grounded coffee beans into the filter
Pour hot water onto the filter
Slowly watch as the extraction process is happening
Explain to the audience what the process is and how it’s
happening
Big ideas
Coffee is a solution of water and coffee beans.
The temperature of coffee can change the solubility.
Extraction is a method of the separation of the substance
from the object.
How the demonstration relates to the chemistry of
coffee.
By making the coffee within the paper filter were able
to see how the solution is made between the water and
coffee bean. The coffee bean chemicals are the solute
and the water represents the solvent. Using the grounded
coffee bean or the coffee bean’s chemicals with water,
we’re able to see the extraction of the bean’s chemicals
blending in with the water. Making the coffee with a
paper filter will give you a inside look of what’s going on
inside the coffee maker and the extraction process
between hot water and ground coffee beans. Once the
water runs through the ground coffee well be able to see
what comes out under the filter.