Tag: STEM Books (Page 12 of 16)

For the Good of Mankind? Blog Tour

Today’s STEM Friday book is not our usual fare. In For the Good of Mankind?: The Shameful History of Human Medical Experimentation, author Vicki Oransky Wittenstein for-the-good-of-mankindhas gathered horrific examples of medical experimentation performed on people without their knowledge or consent. Although you might expect the cases to be largely from previous centuries, the sad truth is that Wittenstein has uncovered examples right up to the present day.

Note: If you are squeamish, you should probably stop reading right here.

Wittenstein starts the book with the outrageous story of Simeon Shaw, a four-year-old Australian boy who developed bone cancer in 1946. With a great deal of fanfare and publicity, the boy and his mother were brought to the University of California Hospital in San Francisco for treatment. Unbeknownst to most people involved, including Simeon’s mother, he was injected with radioactive materials instead and his tissues were harvested to study the movement of radioactive materials in the human body. Simeon was sent back home without receiving any actual cancer treatment and died months later.

The author sticks to her thesis about the conflict of medical experimentation and patient’s rights for the rest of the book, digging out case after case of painful, often fatal, medical experiments carried out against the patient’s best interest and mostly without informed consent. Accounts range from the words of a survivor of Dr. Mengele’s concentration camp experiments to the more recent Trovan experiment in Nigeria, where certain participants were given the unproven drug Trovon to cure their meningitis instead of an antibiotic that was known to work.

Some of the case histories felt like they needed a bit more perspective. Why did  the doctors in California want to perform experiments with radiation on a small, sick boy? Why couldn’t they have used an animal model? Unless the reader is an ardent student of history who understands the time period, it feels like the historical context, experimenter’s motivations and even the outcomes have not been described fully enough.

For example, Edward Jenner tested the idea behind smallpox vaccine by giving his gardener’s young son cowpox and then purposely exposing him to smallpox without the boy’s knowledge. It seems atrocious to purposely infect a small boy with a potentially fatal disease. What is not mentioned in the book, however, is that others had already conducted successful experiments using cowpox to create immunity against smallpox and Jenner had every reason to believe he would also be successful. It would not be difficult to include numbers as to how many people were dying from smallpox at the time (20% of the population according to one source) and how many lives were saved by the vaccine, but that is not revealed.

Does establishing that there might have been some benefits – or at least compelling reasons for the inhumane experiments – somehow negate or justify the wrongfulness of the procedure? To my mind, it does not. I think, however, that being able to more fully examine the experimenter’s actions based on the information available at the time does help add important historical context that might allow researchers and policy makers to avoid similar patterns of thinking in the future, such as what boundaries regarding personal freedoms and human decency should be safeguarded when a country is at war.

Regarding safeguards, the author shows that we have made significant advancements in the area of medical ethics over time. As modern techniques take our abilities into the realm of science fiction, we need to make sure policies remain in place to protect individuals, and particularly the most vulnerable ones, from the types of cruel treatments in the name of medical advancements the author has uncovered.

Obviously, this is a thought-provoking book. For the Good of Mankind?: The Shameful History of Human Medical Experimentation is likely to leave the reader with many tough questions to ponder. It is probably best for mature young adult readers interested in medical history and ethics.

Discussion guide available at Vicki Oransky Wittenstein’s website

Publisher: Lerner Publishing Group (August 1, 2013)
ISBN-10: 1467706590
ISBN-13: 978-1467706599

To find out more about the book and Vicki Oransky Wittenstein, check the blog tour stops:

Mon, Nov 4
proseandkahn

Tues, Nov 5
The Prosen People

Thurs, Nov 7
The Nonfiction Detectives

Fri, Nov 8
Growing with Science

Mon, Nov 11
Ms. Yingling Reads

Tues, Nov 12
Through the Wardrobe

Wed, Nov 13
Kid Lit Frenzy

Thurs, Nov 14
GreenBeanTeenQueen

Fri, Nov 15
The Fourth Musketeer

Disclosures: This book was provided by the publisher for review purposes. Also, I am an affiliate for Amazon, and if you click through the linked titles or ads and make a purchase, I will receive a small commission at no extra charge to you. Proceeds will be used to maintain this self-hosted blog.

 

Come visit the STEM Friday blog each week to find more great Science, Technology, Engineering and Math books.

Desert Food Webs in Action

Today for STEM Friday we are featuring Desert Food Webs in Action (Searchlight Books) by Paul Fleisher. desert-food-webs

We often think of the big, flashy animals like the mountain lions and the coyotes when we think of the desert. All the living things in the desert matter though, even the tiny ones. The bigger animals depend on many plants and smaller animals to provide them with food. Decomposers like ants, fungi and bacteria are also important because they help recycle nutrients. This book describes the various desert creatures and how their lives are interrelated via food chains and food webs.

desert-food-web

The producers are plants that gather and store energy from sunlight, like cacti, succulents, wildflowers, shrubs, trees and grasses. They produce food for the other stages.

Primary consumers are animals who depend on plants for food. Examples are insects, birds like hummingbirds, and desert tortoises.

Secondary consumers rely mostly on other animals for food. Spiders and birds that eat a lot of insects are secondary consumers.

Tertiary consumers are carnivores that eat both secondary and primary consumers. Examples are hawks and kingsnakes, a type of snake that eats other snakes.

Not shown in the illustration are scavengers and decomposers. Scavengers feed on dead animals. They are part of nature’s clean up crew. Decomposers break down both animal and plant materials so that plants can use the nutrients again.

javelina

Food webs aren’t always neat and tidy. For example, javelinas are mostly thought of as primary consumers because they eat plant materials like prickly pear fruit and mesquite beans. They are also known to eat lizards, mice and dead birds, which would make them scavengers and secondary consumers, too.

Want to learn more about desert creatures? Desert Food Webs in Action by Paul Fleisher is a good place to start.

When you are ready, why not construct a desert food web of your own?

Where to find out more:

Ages: 8-11
Series: Searchlight Books
Paperback: 40 pages
Publisher: Lerner Publishing Group (August 1, 2013)
Language: English
ISBN-10: 1467715522
ISBN-13: 978-1467715522

Disclosures: I am an affiliate for Amazon, and if you click through the linked titles or ads and make a purchase, I will receive a small commission at no extra charge to you. Proceeds will be used to maintain this self-hosted blog.

 

Come visit the STEM Friday blog each week to find more great Science, Technology, Engineering and Math books.

Exploring the Water Cycle

Once children have begun to be aware of how important water is to our planet and to living things, it is time to investigate how water recycles.

the-water-cycle

Our post today was inspired byWater Cycle (Pebble Plus: Earth and Space Science) by Craig Hammersmith, which is a picture book that introduces many important concepts and vocabulary words pertaining to the water cycle, such as evaporation, condensation and precipitation. Along with a glossary and an index, there are instructions for making a “mini-earth” in the form of a terrarium. (A review copy of this book was provided by the publisher, Capstone.)

The first step to understanding the water cycle in understanding the states of matter. Water is an ideal substance to study because it exhibits three of the four states of matter (solid, liquid, gas) at relatively normal temperatures.

Solid Water (ice, hail, snow):

Gather:

  • Plastic tubs of different sizes, food molds, ice cube trays, clean milk cartons, etc.
  • Access to freezer
  • Water
  • Food coloring (optional)
  • Spray bottle (optional)
  • Springs of herbs, flower petals (optional)

Put some water in different-shaped containers and freeze it. Allow the children to help pick containers and fill them. For added enjoyment, add a few drops of food coloring to the water. Or you can add bits of edible flowers such as roses, or leaves of herbs as decorations. Explain that the liquid water is going to become solid.

On a warm day, take the ice outside and use it to build ice sculptures. Remove the ice from the containers by briefly immersing in water if it won’t just slip out. If you don’t have time to make special shapes, simple ice cubes can work great for this, too.

Have the children pile the ice to make buildings, animals or abstract forms. You can lightly mist the finished products with water containing food coloring. Then watch the sculptures melt. Predict how long it will take. Explain that the solid water is becoming liquid water by melting.

Older children can design inventions to protect the ice from melting, and then build and test their invention by seeing how long it takes for the ice to melt inside the device versus unprotected.

(See a previous post about snow science, too.)

icicles

 

Liquid Water:

Learning how to make a water siphon is a fun and useful way to learn about some of the properties of liquid water.

Gather:

  • Small amount of tubing, such as clear plastic aquarium tubing – about 18 to 24 inches long
  • Water
  • Two bowls or other containers large enough to hold tubing submerged, or even a large glass and a sink
  • Food coloring (optional)

Fill one of the containers with water. Add a few drops of food coloring (optional). Submerge the tubing under the water and jiggle to remove air bubbles until the tube is filled with water. Place your thumb tightly over one end of the tube and move it to an empty container, ideally slightly lower than the first. Release your thumb and the water should start moving from the filled bowl to the empty one via siphon action. It may take some practice if you have never done it before.

You can also put two straws together to use instead of tubing, as shown in the first video (Note: there is a pop-up ad):

 

The video below by Doctor C shows how a siphon works using a chain model. (Note:  The narrator takes a sip of the water at the end. You might want to turn the video off before you reach that point to prevent copycat behavior.)

 

For older children, time how long it takes to fill a container of known size and calculate rate of flow. Figure out how long it would take to empty a ten gallon fish tank with your siphon. How about an average swimming pool?

pool-water-texture

(Pool Water Texture by Petr Kratochvil)

Water as a Gas
:

To study water in the gas form, you will need water, paint brushes and a sidewalk or driveway on a hot day. If you must stay indoors, a chalkboard will work too. Simply paint the water onto a flat surface and then time how long it takes to evaporate. Explain that the liquid water is turning into a gas as it disappears and is rising up into the air. That is called evaporation.

To show the gas water turning back into liquid, set out a glass full of ice water on a warm day. The gas should condense into liquid around the outside of the glass after a few minutes, creating droplets. This is called condensation.

Water_cycle

The USGS has a great deal of child-friendly information about the water cycle.

If you would like to make a terrarium as a model of a water cycle, see our previous post.

See how a man kept a plant in a bottle for years without adding water or air (Note:  website has numerous ads and images that might not be child-appropriate).

You could spend a lifetime studying water. Next week we’re going to find out where the the water in your home faucet comes from and how it gets to the tap.

Water Cycle (Pebble Plus: Earth and Space Science) by Craig Hammersmith

Age Range: 4 and up
Publisher: Capstone Press (August 1, 2011)
ISBN-10: 1429671424
ISBN-13: 978-1429671422


Disclosures: The book was provided for review purposes. Also, I am an affiliate for Amazon. If you click through the linked titles or ads and make a purchase, I will receive a small commission at no extra charge to you. Proceeds will be used to maintain this self-hosted blog.

 

Come visit the STEM Friday blog each week to find more great Science, Technology, Engineering and Math books.

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