MicroSTEM 7-10: Bacteria Among Us
Students began a two day project today, investigating bacteria that surrounds us. Each student will test their own fingers, and each group of 4 students could pick up to 8 different surfaces to see what kinds of bacteria live there. Alternatively, the students could choose to see what happened to the bacteria from the same surface with some sort of treatment (applying hand sanitizer, soap, etc.). Students were given the chance to make a hypothesis about what they expect to see on their plates. Later on this week, the students will use a microscope to look at the results of their samples, and test their hypotheses.
Ask your student: If bacteria surrounds us, why don’t we get sick more often? (Not all bacteria are pathogenic (disease causing)) What are some examples of places where good bacteria are found? (Almost anywhere has some amount of good bacteria, some examples would be in our intestines and mouth)
Engineering Explorations 7/10: Mini Lungs
Today, in Engineering Explorations, the students learned about the anatomy of the heart and lungs and how they function in the human body. Our bio-engineers built their own working model of a lung and demonstrated how the diaphragm works based on air pressure differentials. The end goal of the day was to relate the lung model to relevant heart anatomy and physiology.
Ask your student: What is the purpose of the diaphragm in the respiratory system? (Each breath begins with a contraction of a dome-shaped sheet of muscle underneath the lungs called the diaphragm. During inhalation (taking air into your lungs) your diaphragm contracts, or flattens downward, which reduces pressure in the chest cavity. Normal outside air pressure is higher, which forces air through the nose and mouth, down the trachea and into the lungs where pressure is lower (pressure systems move from high to low). On the other hand, upon exhalation your diaphragm relaxes, which increases pressure on the lungs and forcing air, containing carbon dioxide, out of the body.)
App & Game Development 7/10
Today, we began our app and game development program! Students were introduced to the principles of software development, and the iterative design process. By designing, testing, and reshaping aluminum foil boats, we discovered how to record our goals, designs, and test results in order to improve an invention with each iteration. Additionally, students began working with the software development platform Construct 2, which they used to create their first programs!
Ask your student: How many pennies was your first boat able to hold? What about the second one?