“Rubber” Eggs

 - by KitchenPantryScientist

 

This experiment never gets old!  Put some raw eggs into jars and cover the eggs with (white or cider) vinegar. Remember to always wash your hands after handling raw eggs, since they can carry a bacteria called Salmonella enteriditis!

Do you notice anything happening to the eggs when you add the vinegar?

Let them sit overnight in the refrigerator and see what they feel like the next day.  Before handling the eggs, gently rinse them with water, and be careful not to get vinegar in your eyes, since vinegar is an acid and stings!

Only the membrane of the egg will remain, which is like a rubbery balloon.  What does it feel like?

If you want, draw or record what you observed in your science notebook.

What happened?  Egg shells are made up of two chemical elements called calcium and carbon, which stick together in calcium carbonate crystals.  Vinegar is an acid that breaks the crystals apart in a chemical reaction.  The  carbon and vinegar react to form carbon dioxide bubbles, which you probably noticed when you added the vinegar to the eggs.

To make alien monster eggs,  return the eggs to the  jars.  Cover them with corn syrup and add some green food coloring.  Leave them for 24 hours in the refrigerator and see how they feel the next day!

What happens?  The balloon-like membrane of the soft eggs let water molecules pass through.  Corn syrup doesn’t have much water in it, and water molecules move out of the egg into the corn syrup, making the egg shrivel.

If you want to, now try rinsing the eggs and submerging them in water again overnight (in the fridge.)

Happy eggsperimenting!

Seeing Stars

 - by KitchenPantryScientist

My son is obsessed with UFOs.  Every time we go outside at night, he scans the sky for moving spots of light.  I tend to be dismissive, brushing off his imagination like a pesky fly, worried that he won’t go to sleep for fear of an alien invasion.

It’s not that I’ve discounted the possibility that there may be intelligent life elsewhere in the universe (I love Star Trek as much as the next geek), but it’s always seemed unlikely to me, and not worth much thought.

A  field trip to the planetarium with my son’s class last week gave me new perspective though.  After the requisite, but fun voyage through the constellations we see from our own green and blue planet, our guide turned on a second projector.  We virtually zoomed away from earth, escaped our tiny solar system, and flew out of our galaxy to view a dazzling array of billions of galaxies sparkling like jewels in the vast universe.

I walked out of the dark room in a daze, feeling like a speck of cosmic dust and filled with absolute certainty that my 10-year old is much smarter than I am.  Last night I caught myself scanning the night sky, imagining aliens.  It made me smile.

It Takes a Village

 - by KitchenPantryScientist

I did Q&A’s with a few winners of the Children’s Defense Fund’s “Beat the Odds” scholarship winners and was inspired by their stories.  Here is one of them:

I am standing before you as the living metaphor, a reminder of kids that grow up in war zones, of kids that grow up without childhoods; of kids in need of a home, a father or mother, and of kids without futures, unless those of us who have the power to change their lives are willing to take action.” Wesley Alcenat at the 2006 “Beat the Odds” celebration.

“If it takes a village to raise you, it will take a village to also help you succeed. Don’t believe the hype or the myth that tells you to raise yourself by your bootstraps. No one in this world makes it by raising themselves by their own bootstraps. Just as it is logically and physically impossible to do that, it is impossible to find success without combining a sense of personal responsibility with the support, love, and the nurturing of a community.”  Wesley Alcenat in my interview with him last week.

Westenley came to the United States from Haiti, where both his parents were killed by soldiers and he witnesses countless atrocities.  With the help of his grandparents and a supportive educational system, Wes was able to overcome his past and move forward in life, but never forgot where he came from and others like him who suffer so much.  His amazing story continues today.

How do you like college?  What are you studying and what’s your favorite class at the moment?

Although I am currently out of college, I am still in the college setting and love it very much. I graduated in May 2010 with a bachelor in Political Science/History. I am attending Columbia University in New York, where I am enrolled in the American History program as a Ph.D candidate. At the moment, I enjoy my class on American politics, called “Themes in American Political Development.”

Are you involved in any extracurricular activities or volunteering?

Outside of school I am part of a school reform program in which graduate students like me are paired with high school and junior high teachers teaching American history. The hope is that I will get an idea for what it’s like to teach and in the process teachers will benefit from my “expertise” in history. As of a week ago, I began taking Tango classes on Thursday nights.

I just read your bio and was especially interested to see that you’d eventually like to receive a Master’s Degree in Public Health, which seems especially relevant in the wake of the cholera epidemic currently causing so many problems in Haiti.  Are you hoping to work with diseases like cholera related to poverty, or have you changed directions?

That’s a good question. My interests are diverse and constantly evolving. While I am still interested in Public Health, I have changed course. I am still deeply interested in issues of social justice, philanthropy, and the well-being of the poor and the vulnerable. This interest led me to take a role in helping to find funds to help earthquake victims in Haiti while I was still in college. I don’t believe that I will ever lose my love of service. That is why I aspire to someday end my life in the non-profit sector, either as an official of a non-profit organization or a key player in some other way, shape or form. I am driven by the crusade to end or alleviate poverty; if not poverty, than the ending of systemic impoverishment as we know it. Abject poverty is inhumane, unacceptable and from my perspective, something we can completely eradicate if the will is there. My direction to education sustains this position as I believe education is the most effective and perhaps proven tool for tackling poverty and provides the most returns of any type of social reforms.

What are some of your dreams for the future?

As a follow up to the answer to your question above and also to answer this question: Rerouting my ambitions to academia has invited skepticism by family and friends alike that there is no place for academics in social change/justice. I disagree emphatically about this notion that intellectuals are engage in the pursuit of things disconnected from the everyday concerns of practical life. Nothing can be farther from the truth. My decision to study history is embedded in my long-term interests with the practical concerns of education, economic justice, and producing model citizens for a democratic society. Although my interests in political life and philanthropic service is still very strong, I believe I will be most useful when I can connect my aspirations for a future of progress with the knowledge that our struggles right now in the present are a result of our past failures. How better of a country would we be if every politician could echo this point. Instead, we’ve seen a culture of anti-intellectualism that is in itself a shorthand for maintaining the status quo. And that means, further deteriorating the very conditions that organizations like CDF has for decades tried to ameliorate. How can we try to reform society without knowing why reform is needed in the first place? History is memory, and a nation without memory is a country without any collections of who it is, what it is, and ultimately it doesn’t know itself. That is why I believe in the long-term, my education will prove to be an investment in making me a better public servant in whatever capacity, wherever and whenever that opportunity may arise in the future.

What advice would you give kids struggling with adversity to help them succeed as you have?

Although I hate to simplify, any kids who can make good on their understanding and execution of the following quotes will have increased their chances at succeeding in their endeavors:

“Education is our passport to the future, for tomorrow belongs to the people who prepare for it today…Of all our studies, history is best qualified to reward our research” -Malcolm X (Malcolm is not saying that you have to become a historian, but that it’s almost impossible to know where you need to go, if you don’t know where you are coming from.)
“Education has in America’s whole history been the major hope for improving the individual and society.” -Gunnar Myrdal

Helping Others Beat the Odds

 - by KitchenPantryScientist

Social, cutural and economic hurdles make it difficult, if not impossible, for many American students to succeed in school and go on to attend college.

Lily Moua, a 2002 recipient of a “Beat the Odds” scholarship from the Children’s Defense Fund of Minnesota, first tackled the issue of Hmong girls and education head-on when she was in high school.  Setting up meetings between parents and students in her community allowed Hmong students to explain the importance of extracurricular activities for educational opportunities to their parents, while giving  parents a place to voice their fears of cultural abandonment.

Lily is the sixth of 12 children of Hmong immigrants who struggled to face the challenge of becoming a member of American society while respecting the wishes and culture of her parents.   Although her parents realized the importance of  education, they expected Lily to come home after school and fit into the traditional Hmong girl’s role where she should help around the house and have no goals beyond marrying and raising a family.  In an essay for the Beat the Odds scholarship program Lily wrote, “I had a vision about how remarkable it would be if the language and culture barriers between parents and students improved and if a system of support and trust could be built between parents and students.”

Lily went on to attend St. Olaf College in Northfield, MN.  I interviewed her last week about her college experience and what she’s doing today.

What did you study at St. Olaf? Sociology and Anthropology Major.  Management and Asian Studies Minor. I studied aboard in China, Thailand, Vietnam, and Tanzania.

Were you involved in any extracurricular activities, or did you do any volunteer work? Yes. I was extremely busy leading, teaching, and dancing on campus. I also mentored and tutored a number of students on and off campus and served on three non profit boards and committees. I continue my same legacy in college like in high school where I taught Hmong college students how to speak, read, and write Hmong so that they can be comfortable and confident in their bicultural abilities.  In addition, I taught the students how to appreciate their culture and their parent’s sacrifices.  We had annual Hmong appreciation banquets where Hmong parents got to learn about the experience of going to college and we shared with them our appreciation for our culture and heritage–this became a great bonding experience for parents and their son/daughter and a good recruiting mechanism for St. Olaf.

Did you go on to medical school, or were you inspired to take a different path? After I started college, I decided that I wanted to travel and study abroad as much as possible.  Studying pre-medicine did not allow me to be flexible or to explore my life/career passions.  It was the end of my freshmen year that I decided I did not want to dedicate my life to studying medicine. I found my love for studying people, cultures, places, structures, and organizations while studying abroad and making sense of my interests in college.  I discovered that I wanted to do many things and explore multiple careers that allowed me to leave a legacy, make a difference in numerous ways, impact larger communities and societies, and where I can live well plus have a healthy and fun life style. After graduating and working for Target Corporation, I continued on to pursue my masters degree in public policy.

What are you doing now? Now, I work for the US Dept of Agriculture-APHIS where I do HR classification to help the agency protect agricultural health, regulate genetically engineered organisms, and administer the Animal Welfare Act. I advise and work with management at all levels to ensure their programs and organizations are well structured/designed and the positions are managed and classified to achieve the agency’s goals.  I also do civil rights advising and lead cultural awareness initiatives.

I am also a facilitator for the Hmong Women Leadership Institute, where I get to empower and teach Hmong women about leadership and how to cross culturally navigate systems (the Hmong and American). I mentor a number of individuals, do some fundraising in the community, and also recently started my own real estate investment business.

How did receiving a Beat the Odds Scholarship change your life? Before, I didn’t know that my voice and leadership abilities were acknowledgeable.  I just thought I was an ordinary Hmong girl who dreamed of going to college. After receiving the BTO award, I became confident in myself and believed that I can become successful in helping myself and others live better and dream bigger.  I never had so much attention and media focused on me–that made me realize that the people in Minnesota wanted me to succeed because they saw the potential in me to change and help others. It definitely gave me the confidence to study hard and graduate cum laude, explore areas where I can make the most of my talent, and take advantage of each opportunity where I can learn and make a difference.

Creative Minds

 - by KitchenPantryScientist

Imagination Fair

I love the fearlessness of children’s imaginations.  Kids aren’t burdened with the boundaries of reality, logic, and self consciousness that hinder our adult minds.

Mealworms at the Imagination Fair

When I helped judge the Twin Cities Regional Science Fair and attended my own kids’ Imagination Fair (a creativity fair with no rules) at school, a few things jumped out at me.

First of all, many of the most interesting projects I saw were the ones created with the least use of expensive resources and components.  It made me wonder whether technology can actually hinder creativity.

Imagination Fair Lego Project

Secondly, I was shocked how “white” the science fair was.  I recently read in the paper that some minority groups are lagging far behind in science education (as are American kids in general.)  The science fair seemed to be a giant experiment confirming the hypothesis that we need to do more to foster science education for non-white students.

I did have to suppress a smile when a male judge commented to me that there seemed to be “mostly girls” at the science fair.  I’m not sure that was true, but I look forward to the day when the science fair is an even mix of boys, girls, and kids with skin of all colors from all economic backgrounds.

Marshmallow Slingshots and Transformation of Energy

 - by KitchenPantryScientist

I demonstrated how to make marshmallow catapults on Kare11. Here’s the link. It’s right after the apple mummy demo!

All you need for this experiment are some rubber bands, the plastic ring from the neck of a prescription bottle or the ring from the lid of a plastic milk jug, and a bag of marshmallows.  You’ll also need a chair turned upside down to complete your catapult.

Make a chain of rubber bands (you can double it to make it stronger) with the ring in the center.  You’ll figure out how to do it if you try, but basically, overlap two rubber bands and pull the bottom one through the one on top and then through itself.  Voila!

Secure your catapult to a chair, set up a few targets and watch the elastic energy stored in the rubber bands become the energy of motion when you let go of the marshmallow.  It may take some practice, but soon you’ll be a confectionery warrior.  Let the marshmallows fly!

The science behind the fun is called TRANSFORMATION OF ENERGY.  When you pull the rubber band back, you are doing WORK on the rubber band.  How much WORK you do depends how hard you pull on the rubber band (FORCE) and on how far back (the DISTANCE) you pull the rubber band.  WORK=FORCE X DISTANCE.  The work you do is stored as ELASTIC ENERGY in the rubber bands.  When you release the rubber band, the rubber band then does WORK on the marshmallow and the ELASTIC ENERGY is transformed into what is called KINETIC ENERGY (the energy of motion) in the flying marshmallow.  When the marshmallow hits something and stops, the KINETIC ENERGY is then transformed into heat, or HEAT ENERGY.  In other words, the ENERGY you produce by pulling back on the rubber bands isn’t lost.  It’s just transformed from one kind of energy to another.

How to Mummify Apples

 - by KitchenPantryScientist

We had an amazing time at the  King Tut exhibit at the Science Museum of Minnesota and the omnitheater film Mummies, Secrets of the Pharaohs, gave us a fascinating look into the rituals of mummification.

We learned that Natron, which was used in Ancient Egypt to preserve mummies,  is a natural salt mixture containing sodium carbonate  decahydrate (soda ash), sodium bicarbonate (baking soda), sodium chloride (table salt), and another salt called sodium sulfate.  Salt is a dessicant, which is a chemical that removes water from things.  It also has anti-microbial properties, which means it kills bacteria and fungi.  When you remove water and microbes from the picture, mummies bodies’ don’t decompose.

I read that you could use different combinations of table salt, Epsom salts and baking soda to try to replicate Natron and mummify apples, so we tried it out…Here’s a demonstration we did on Kare 11.

First, we decorated some of our plastic cups with Markers, since every mummy should have a fancy sarcophagus (even an apple).  Then, we labeled them as follows:

control/table salt alone/Epsom salt alone/baking soda alone/half table salt, half Epsom salt/half table salt,half baking soda/half Epsom salt,half baking soda/ and equal parts table salt, baking soda and Epsom salt.

We cut an apple into 8 equal pieces and added one to each cup, covering them with the appropriate salt mixture and adding a loose top to the cups (we used foil cupcake holders.)  We let them sit for a week and exhumed them to see what happened.  It was amazing how different each apple looked, and how much liquid was in some of the cups!  After we checked them out, we returned them to the cups with some dry salt mixture to let them go for another week!

The Egyptians would dry their mummies with Natron in windy tents in the dry desert air for40 days before wrapping them for their final burial.

You can weigh your apples before drying them to see how much water they lose!  We tried the experiment with whole apples too, peeling and coring one, coring another and leaving one intact before covering them with salt mixture.  We even wrapped on in cloth strips, just for fun!

What keeps mold from growing?  What preserves the apple’s color best?  Which salt mixture keeps the apples from smelling bad?

Face to Face with Pharaohs at the Science Museum of Minnesota

 - by KitchenPantryScientist

We wandered into the burial chamber.  As I leaned closer to stare at the inlaid stone and intricate hieroglyphics on the golden coffinette, awestruck by the craftmanship, my son whispered in my ear, “Mom, King Tut’s stomach was in there.”

Coffinette at Science Museum of MN

Beside me, my five year old screwed up her eyes in concentration as she punched the numbers of the exhibit into her audio speaker before holding it to her ear, and my oldest daughter scanned the hierogyphics for birds and circled the sarcophagus of a royal cat. Even my husband, who claims to intensely dislike archeology, happily wandered from room to room reading about the pharaohs.

When I was nine, I saw the King Tut exhibit in San Francisco, stared into the eyes of the famous gold mask and fell in love.  Egyptian art and artifacts are like Vincent Van Gough’s paintings.  You don’t really understand what all the excitement is about until you stand in front of them.  Some of the things I expected to be life-sized were diminutive, and it was shocking to see the large scale of some of the artifacts.

To my eyes, Egyptian art contains some of the most beautiful faces and figures, both animal and human, that I’ve ever seen.  Even the shadows cast on the walls behind the statues are graceful and life-like.

Oh, and Harrison Ford narrates the audio tour as you walk through the tomb.  Genius.

But this is a science blog, and I should talk about science.  The final room of the exhibit is full of mummy science and contains a fascinating replica of King Tut’s mummy, X-rays and scans of the real mummy and some facts about DNA analysis they’ve done that has helped clarify the lineage of the great pharaohs.  The Omnitheater film “Mummies, Secrets of the Pharaohs” is extremely interesting too and perfect for anyone that wants to know more about mummification, how they get DNA from mummies and what they hope to do with the information science reveals about the pharaohs.

The kids and I mummified apples last week to get a little insight into the science of mummification.  I’ll post directions on how you can mummify your own apples tomorrow and demonstrate how to do it on Kare11  Monday morning, Feb.21st (President’s Day.)

Tutankhamun: The Golden King and the Great Pharaohs is at the Science Museum of Minnesota now.  Don’t miss it!

The “Rightness” of Being Wrong

 - by KitchenPantryScientist

“Surprise, bafflement, fascination, excitement, hilarity, delight: all these and more are part of the optimistic understanding of error.  This model is harder to recognize around us, since it is forever being crowded out by the noisier notion that error is dangerous, demoralizing, and shameful.” Kathryn Schulz- Being Wrong Adventures in the Margins of Error

We can’t be truly creative if we’re afraid to make mistakes. Kathryn Schulz’s book reminds me of the importance of allowing our kids to make plenty of mistakes, and to approach problems expecting to be wrong several times before they find the expected (or maybe unexpected) answer.

When my own kids do math, they don’t want to show their work or, God forbid, have their mistakes on paper for all to see.  A friend who teaches writing told me that kids today have a hard time being creative because they don’t know what they’re “supposed” to write.  The amazing journey of learning, full of missteps and wandering off the path, seems to be disappearing in light of constant testing and competition in schools. It’s not the teachers who are to blame, but the system, lack of funding, and maybe even the parents who hunger for good test scores and admission to prestigious colleges.

Doing science, art, writing and music at home is a great way to teach your kids how much fun mistakes can be.  Tell them that many great scientific discoveries have been made because of goof-ups in the laboratory. Remind them that paintings and stories often end up better when they take a different direction than the intended one.  Perfect is boring.

Have them sit down at the piano and make up a song, rather than just playing their lesson.  If they’re crying about a drawing they don’t like, encourage them to turn the scribbled spot into a tornado.  Let them do a science experiment- and stay out of it.  As long as they’re not doing anything dangerous, let them improvise.

As parents, we should admit our own mistakes, laugh at them, and point out the ones that turn out not to be so bad after all.  Teaching our kids to have a sense of humor about themselves is one of the greatest gifts we can give them.

Mistakes can lead to great things.  There has never been anyone truly amazing who was afraid to make a few along the way.

Don’t be a “Tiger Mom”  be a Tigger Mom!

Fingerprint Fun and Homemade Valentines

 - by KitchenPantryScientist

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Who says science and art can’t go hand-in-hand?  It’s easy to lift and study fingerprints using scotch tape, and colorful fingerprint designs make great Valentine’s cards, so what are you waiting for?  All you need for the science part is paper, scotch tape and a pencil.  For the valentines, you will need an ink pad, paper and markers.

On www.wikieducator.org/Fabulous_Forensic_Fingerprints, I found a fingerprint-lifting technique that works well, even for very young children.  Simply take a pencil and scribble on a piece of paper until a small area is covered with the graphite from the pencil lead.  Rub your finger around in the graphite until it is covered with gray.  Place your finger on the sticky side of a piece of scotch tape and then carefully lift your finger up.  A clear fingerprint should be visible.  Place the tape face-down on another piece of paper to preserve the fingerprint.

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You can then inspect the fingerprint under a magnifying glass, or with your naked eye.  If you go to the wiki website I mentioned, you can decipher whether your fingerprint is a whorl, a loop, or an arch.  It’s fun to trace your hand, fingerprint each finger and thumb, and tape your fingerprints to the appropriate fingers on the outline of your hand.  Fingerprints would be a great addition to your science notebook!  Kids have a lot of fun with this project and can do it unassisted once you show them what to do.

Older kids can try lifting a fingerprint from a hard surface!  Put an oily  fingerprint on a drinking glass, dust it with cocoa powder (you can use a feather), blow on it to remove extra powder, and lift the print using scotch tape.  Tape it on some white paper to see it.

To make Valentines, put two fingerprints or thumbprints together in the shape of a heart.  It’s also fun to make fish, bugs, and anything else you can think up!  I gave my kids some ideas to get them started and they went from there!  (You can add details with markers.)   Have fun!

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