Treat yourself (or your teacher) to the science of a mocha mask!

  In honor of teacher appreciation week, we’ve got an educator how-to that will make you feel like a million bucks! It’s a great gift for the teacher in your life as they finish up the school year. If you happen to be a teacher, then treat yourself to a 15-minute facial that can revitalize you for those last few weeks of school!Mask Ingredients

  First, grab a few ingredients from your pantry or your local grocery store. For a quick one-person batch, you will need ground coffee (2.5 teaspoons), cocoa powder (2.5 teaspoons), honey (1 teaspoon) and plain yogurt (4 teaspoons).Once you have all the ingredients, combine the ground coffee, cocoa powder and honey in a small bowl. If you are giving it as a gift, seal it up into a container and make a note to add four teaspoons of yogurt before applying it to the face. Don’t add the yogurt until you are almost ready to use the mask.

  When you’ve got 15 minutes all to yourself, add the yogurt to the bowl of other ingredients. Mix it all together and apply the mask to your face and neck, avoiding the eyes. The mask will take about 15 minutes to harden. Once it is hard, rinse your face. It will leave your skin with a radiant glow, and hopefully, this pampering will leave you with a little extra energy for the month ahead.

 

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It may look a little weird at first…

  Now, let’s talk about some science behind this mocha mask! Your skin is the largest organ in your body, so we need to take care of it. It is made of several layers. The innermost layer is subcutaneous fat which stores your energy and helps control your body temperature. The next layer is the dermis, where you make sweat, create oil, and grow hair. This layer is very helpful because sweat helps cool the skin when it gets too hot, and oil allows our skin to be smooth and waterproof. The outermost layer is the epidermis, the layer we are targeting with the mocha mask! At the bottom, the epidermis creates new skin cells, and throughout the course of a month those skin cells travel to the surface and flake off. The coffee grounds in our mud mask will help get rid of some of our older skin cells. This can prevent clogged pores and harmful bacteria from growing on our skin. With this mask, we say, “Out with the old and in with the new!”

  Now that we’ve cleaned off the old skin cells, we need to make sure we didn’t take out all of the moisture from our skin. With too much washing, our skin loses oil, the natural protection created by the dermis. By adding yogurt to our mask, we are replacing the oil with moisturizers to help protect and hydrate our skin. In addition to yogurt, we added honey to our mask. Although we are using only a small amount of honey in our facial mask, the beneficial properties of honey are of note! For centuries, honey has been used as part of skin care in a number of different cultures. It has been used as an antibacterial and as an anti-inflammatory often to treat wounds. For our purposes, the small percentage of honey works as an antioxidant for our skin that can protect our skin cells from UV damage. It works a little like a natural sunscreen!

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…but it’s actually quite refreshing!

  For those of you looking to make multiple batches as gifts, just keep the ratios for the ingredients. Also, hold off on the yogurt for now. You can make a note that tells your favorite teacher to add the yogurt when they are ready to apply the face mask!

Mocha Mask Recipe:

· Ground coffee – 2.5 parts

· Cocoa powder – 2.5 parts

· Honey – 1 part

· Plain yogurt – 4 parts

  To all of the teachers, we’d like to say a special thank you from The Houston Museum of Natural Science. Enjoy your mocha mask, and remember summer is just around the corner!

Girl Scouts earn badges for science at HMNS

by James Talmage, Scout Programs

After more than a year of hard work, Girl Scouts Heidi Tamm, Zoe Kass, Meredith Lytle and her sister Angela Lytle completed the entire Scouts@HMNS Careers in Science instructional series, earning each scout a total of seven badges.

Careers in Science is the Scouts@HMNS series of classes for Girl Scouts that aims to introduce girls to different scientific fields, lets them meet women working in those fields, and shows them what it’s like to work at the museum. There are seven different classes: Archeology, Astronomy, Biology, Chemistry, Fossil Dig, Geology, and Paleontology. As the Fossil Dig class finished up March 7, those four girls added their seventh and final Careers in Science patch to their vests.

Girl Scouts accept badges for completing the Careers in Science series of classes at HMNS. Pictured from left to right are Angela Lyle, Meredith Lyle, James Talmage, Heidi Tamm, and Zoe Kass.

Girl Scouts accept badges for completing the Careers in Science series of classes at HMNS. Pictured from left to right are Angela Lyle, Meredith Lyle, James Talmage, Heidi Tamm, and Zoe Kass.

Heidi Tamm and Zoe Kass have been taking the classes together since the summer of 2013.

“They were really into earning all the patches and completing the whole series of classes.” said Julia Tamm, Heidi’s mother.

Heidi, whose favorite class was Archeology, said, “I liked science before the classes, but now I understand about the careers and what people actually do.”

Zoe kept taking the classes because of the fun activities and being able to see the museum in more detail. Her favorite class was Paleontology, which focuses on the Museum’s Morian Hall of Paleontology. 

Meredith and Angela, Girl Scout Cadette and Senior, respectively, have also taken all the classes together. Angela explained that she learned “there are lots of careers in science available and there are lots of women that work in science, especially at the Museum.”

Meredith encouraged other girls to try out the classes, even if they aren’t interested in science.

“You may decide you like it, or you’ll just learn something new,” she said.

The sisters agree that the Girl Scouts organization is moving more toward STEM (Science, Technology, Engineering, and Math) careers, and that it’s not a boy thing to go into science. Anyone can do it, especially Girl Scouts.

For more information on the Careers in Science series, visit http://www.hmns.org/girlscouts/ and start collecting your patches today!

Chemistry Demonstrations: This Eureka Moment is brought to you by HMNS Volunteers

Editor’s note: Today’s post was written by Tom Szlucha, a volunteer docent here at the Museum.

“EUREKA!” In his excitement, Archimedes runs down the street, naked and dripping wet from his bath. In this legend, he makes a discovery as he immerses himself in the bathtub and notices the water rise. 

It is this observation that leads to the solution to a problem that had been bothering him for some time.The king needs to know if the crown recently delivered by the goldsmith is pure gold or some cheap alloy — and Archimedes has found a way to determine what the crown’s made of!

This example of scientific discovery is based on the very simple observation of the water being displaced as a mass is lowered into it. Archimedes is obviously very excited by his discovery (maybe a bit too excited).

The ConocoPhillips “Hands-On” Demonstration Lab in the new Welch Hall of Chemistry stimulates this same sense of scientific discovery in visitors to HMNS (no bathtub for us though). Chemistry docents conduct hands-on experiments in this lab — experiments that teach, inspire and, most of all, are fun.

 

Now, back to Archimedes…According to the legend, he has to determine if the density of the metal in the crown is pure gold or a cheap alloy of gold.

He develops a very simple experiment to see if a density difference exists between the crown and gold. He places the crown on one side of a balance beam. On the opposite side, he places gold until the scale is balanced.

Then, he lowers the apparatus into a tub of water. If the balance tips to one side because the materials exhibit different buoyancy, then there is a difference in density — which would mean that a gold alloy was used to make the crown.

The principles of density and buoyancy involved in the Archimedes experiment are included in many of our chemistry demonstrations. The demonstrations are given by a group of dedicated HMNS chemistry docents. They come from a variety of backgrounds: chemists, engineers, educators, college students, and others. They have the enjoyment of making these fun, simple, and safe demonstrations that teach and instill an interest in physical science. In return, they are rewarded for their time and effort by seeing children smile with excitement as they make their own “Eureka!” discoveries.

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Tom Szlucha using the “pass-through” to set up

The theater area for these demonstrations is new and improved, a literal “step up” from the work cart that used to be parked in the old Chemistry Hall on the first floor. Downstairs, the new theater has a raised stage with large worktables in front and behind the presenter, allowing for multiple experimental setups. There are pass-through cabinets behind the rear table that facilitate the movement of materials from the preparation and a storage room located behind the stage.

Tom Szlucha in the prep room

Tom Szlucha in the prep room

The audience is seated on rows of black, rubber-coated cubes under the illumination of air molecules hanging from the ceiling. These molecules are different colors, proportionally representing the mixture of nitrogen, oxygen, and trace gases in the Earth’s atmosphere. The suspended molecules make a perfect transition into experiments associated with gases. The demonstration area is enhanced with a well-tuned wireless sound system, making the presenter easily heard by the seated audience.

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There are a variety of experiments performed here, most using simple household materials. Almost every school kid knows how to make a “volcanic eruption” by mixing baking soda with vinegar. But did you know that this acid/base reaction is endothermic, meaning that it absorbs energy, thus creating a cooling effect? A product of this chemical reaction is carbon dioxide gas. Since carbon dioxide is denser (i.e., heavier) than air, it can be poured to extinguish a flame. This stunt can come off as a magic trick—there is no liquid involved as you pour the invisible gas and extinguish the candle flame. Other practical lessons are taught through simple experiments, answering questions such as why do we wash our hands with soap; how do scientists measure the strength of acids and bases; and what does a baby diaper have in common with Jell-O?

Chemistry docents have plenty of opportunities to interact with the audience by soliciting help with these experiments. Participants learn about material density when they make hard-boiled eggs float on salt water and sink in plain water. They help show that Diet Coke is less dense than regular Coke. But why? The explanation is somewhat shocking. The average twelve-ounce can of sugar-sweetened soda contains about forty grams of refined sugar. That’s about three heaping tablespoons of sugar!

Participants also make a rubber “Superball” out of white glue and a simple ingredient found in the laundry isle of the grocery store. This polymerization process utilizes the boron atom in Twenty Mule Team Borax to cross-link the chains of polymers found in casein-based white glue. This experiment helps to teach visitors about some of the characteristics of polymers.

Chemistry Superball

Audiences entertained at the ConocoPhillips Hands-On Chemistry Demonstration Lab range from large school groups to families and individuals spending the day at the museum. The demonstrator has to be somewhat flexible, modifying their routine for the audience that is present. Having multiple tables with large surfaces allows for a number of different experiments to be set up and ready to go. Some experiments may be more suited to a particular age group, so the presenter can pick and choose, thus customizing each show to the specific audience.

If you are interested in joining in the fun by becoming an HMNS volunteer, please visit the HMNS web site to learn more or fill out the short registration form by clicking here.

The Volunteer Office will invite you to come to the museum for a short “get-acquainted” interview and will provide information about upcoming orientation programs. You don’t need to be an expert already, just interested in science! Our fun and comprehensive program will teach you everything you need to know to feel confident working with visitors and students in the HMNS exhibition halls. You’ll get to meet smart and interesting people, learn about a variety of scientific subjects, and become an integral part of one of the nation’s most-visited museums! We look forward to meeting you soon!