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Chemistry Is Cool
Chemistry is the study of matter and the changes that it
undergoes. Why does that matter? Its because Matter is all
around us in various forms, from liquids to solids and even to
gasses. Everything that takes up space is Matter. Chemistry
studies how Matter interacts with each other.
Chemistry plays an important role in our everyday
lives and is responsible for reactions that make
bread dough rise and grow, that allow cleaning
products to kill germs and remove grime, making
Chemistry At Work
Everything you see and everything you touch has the ability to
change. Some things combine with others to become completely
new things, this is called a chemical change. Like when hydrogen
and oxygen, combine in the perfect amounts, similar to a recipe,
and form water. While other things only experience changes in
their size, shape, and form, this is known as a physical change.
Water, for instance, is able to go through multiple physical
changes; it goes from a liquid to a solid when frozen, or to a gas
when heated.
the beautiful explosions of color on the
Fourth of July, and so much more!
Chemistry is also involved in all the other sciences like
Biology – the study of living things, and Geology – the study of
the Earth. That’s why students interested in becoming doctors,
nurses, nutritionists, physicists, geologists, and pharmacists all
study chemistry.
Unscramble the words below to see
what physical and chemical changes can
produce under the right circumstances:
1. Coal + Pressure = mDoniad
2. Dough + Heat = edraB
3. Water + Salt = rteSwaalt
4. Iron + oxygen + water = stuR
5. Heat + Limestone = blerMa
6. Wood + Fire = sAh
Answers: 1. Diamond, 2. Bread, 3. Saltwater, 4. Rust,
5. Marble, 6. Ash
Newsletter
Spring 2013
Quick Change Chemistry
What You’ll Need:
What Are Your Observations?
• 1 small non-metal bowl
After about an hour, check on all three
parts of your experiment again and write
down your observations:
• Paper towels
• ¼ cup white vinegar
• 20 old dull pennies
• 1 teaspoon salt
• One or two or bolts
The Experiment
• What happened to the group of pennies labeled “rinsed”?
Do they look any different than they did before?
• What about the pennies that were not rinsed? Are there
any visible changes to the color of those pennies?
• And the bolts what changes happened to the bolts? Do they
look the same as when you put them in?
In a small bowl, combine the vinegar and salt and stir until the
salt dissolves.
Then add all the pennies to the mixture and wait five minutes.
Remove 10 pennies from the vinegar solution and rinse well
with water. Place the pennies on a paper towel to dry, label
this group of pennies as “rinsed.”
Remove the remaining pennies from the bowl, but
this time, don’t rinse them off. Instead place
them directly on a paper towel to dry.
Now grab your bolts and place them in the
vinegar solution. After 10 minutes, take
a look at bolts. Are they a different color
than they were before? If not, leave the
bolts in the bowl.
Results
The rinsed pennies should appear clean and like new.
This is due to the acidic nature of vinegar. The un-rinsed
pennies will begin to turn blue-green. This is the
formation of the mineral malachite due to the reaction
of the oxygen in the air and the salt from the solution
on the copper penny. Because vinegar is a weak acid,
a small portion of copper is left in the bowl. The steel
from the bolt attracts copper and after a little fizzing
in the solution should start to become coated with the
remaining copper.
Make Change
Making change is fun and important when learning how to spend your money wisely.
Use the picture below to determine how much change you should get back if
purchased three beakers at $2.50 a piece and paid with a $10 bill.
A
B
C
Answer: B