We look forward to seeing everyone in the library at 3:00! STEM Club members, please meet right after school. Don't forget to "dress to impress"! I am so proud of everyone!
Day 2 of our Solar Robot build was a success! Great job being problem solvers and following directions! We have one more meeting to complete our robots before our big presentation on May 4th! We can't wait to see what you accomplished! Please let Mrs. Stoops or Mrs. Thuneman know if you are having trouble or we can help!
Please watch this video to help you decide which Solar Robot you want to create!
We are so proud of Jamaica's STEM club members! Great job today with the successful build of your solar robot head and body! It was so exciting to watch these amazing students build a moving robot from scratch and see their faces when the gears started spinning in the sunlight! You should all be very proud of yourselves. We can't wait to see the finished products.
Homework: Please don't forget to cut out all of your parts and put them into the label bags provided in the kits. This way you will be ready to build on Monday. Also please decide which robot you will be constructing.
Is it possible to use only a copper strip, zinc strip, two wires, and a potato to power a clock? Today the amazing ASU team helped us prove that YES you can! Students worked in small groups to assemble a circuit using the metal strips and potatoes to make a simple battery that created the electricity needed to operate a clock. Each potato worked as a device called a electrochemical cell. It converted the chemical energy stored in the metal strips into electrical energy. A cell works because of the chemical properties of the metals inside. The different properties cause tiny particle charged with electricity (called ions) to move between the two strips of metal. (find their "happy place"). This flow is an electric current. The potato contains the particles that allow the current to flow, but it stops the metals touching. Electric current also flows along the wires between the zinc and copper strips and the clock. This current makes the clock work! Our creative students didn't stop at just potatoes though! They experimented with lemons, salt water, and soda as well. Check out this great video on how batteries work. Can you make the connection to solar cells?
Please create a post about what your team experimented with. Did it work? What conclusions did you make based on your results? Thank you again to the wonderful team at ASU for providing all of the materials and expertise today! Great job to everyone in STEM today, Science ROCKS!
Thank you ASU for the providing the materials and wonderful presentation! A Solar Bag is a long plastic bag made from a very thin plastic and colored black to absorb solar energy. The heated air inside the bag provides buoyancy and causes the bag to float.
How Does It Work?
The work is done by the sun. What is happening to the gas molecules inside the bag? Of course, as the sun warms the air molecules in the bag, their movement begins to speed up. Since the heated air inside the bag is less dense than the cooler air on the outside of the bag, the Solar Bag will float.
Attention S.T.E.M. Club Members...
Reflect on what you learned today or a questions you still have by commenting on this post.
We had a great time learning about energy today! First we introduced physics, inertia, gravity, potential energy, kinetic energy, and acceleration using Newton's Beads Experiment! The fountain of beads flowing from the container was a great science demonstration. The science behind Newton's Beads centers around the principle of inertia. According to Isaac, inertia is the tendency of all matter in the universe to remain motionless if not moving, or, if moving, to continue moving until acted on by an outside force. Lifting the container into the air added potential energy (or stored energy to the motionless beads. The tug you gave the beads to start them flowing was all that was needed to overcome gravity and convert the stored energy into kinetic energy (the energy of motion). As the speed of the moving beads increased, you probably notice that the string actually lifted above the rim of the container a little bit. This was due to the inertia of now fast-moving , falling beads. Newton stated that an object will continue moving in the same direction until a large enough force acts on it (the arcing motion of the beads is caused by the downward force of gravity) to change its speed and/or direction. The beads are now falling at a much faster speed than you downward tug. (www.sickscience.com/go/14nb025)
We also demonstrated the hex nut drop, stick release experiment, and pendulum catch experiment!