Oceanography – Sea-ing Glasses
Some of the most fascinating of sea creatures live in the deep ocean – deeper than rays of light can penetrate. Over generations, these sea creatures have changed colors to help them survive in the deepest parts of the ocean. Today the “under-the-sea interns” examined how light travels beneath the waves and how it affects the living organisms and their survival. The campers created specialty “sea glasses” that allow you to visualize how much light reaches the various depths of the ocean by layering blue cellophane. Using their sea glasses, the campers tested different color fabrics and images of marine life so they could see how visible the sea creatures are at different depths of the ocean.
Ask your student: How does the coloration of the animal help it to survive at different depths of the ocean?
Video of Daphnia magna taken by one of our campers, Yash, with his phone and a micro-phone lens!
Makey Lab – Swing to the Stars
Shall we swing right to the stars? Today our playground engineers continued their work on building out their playground and were challenged to design a swing that could carry different loads. They learned that a swing is actually a pendulum—a weight hung from a fixed point so that it can swing freely backward and forward.
Ask your camper: Did changing the weight of the pendulum affect the times? How did the times change? (The time should not change –only the length of the pendulum affects the time.)
Engineering Explorations – Quantities in Circuits
Our Electrical Engineers were challenged to study and measure the voltage of different batteries using a particular type of equipment called a multimeter. But first, they ranked a variety of batteries based on what they thought was logical (usually size/shape). Campers then measured the voltage of each battery to determine whether or not they need to revise their initial rankings. It was quite a “shock” that a huge D battery has the same amount of voltage as a much smaller AAA battery (1.5v) and a tiny coin battery has more voltage (3v) than a big D battery (1.5v).
Ask your camper: Why would differently-sized batteries be needed if they all (AAA, AA, C and D) have the same voltage (1.5v)? (depends on the amount of current that is needed for the device that requires batteries)