23 February 2012

cute random photos...

an old video recently uncovered!

here's a cute video of us playing a game of "what happens next?". pretty funny stuff! 

learning about: carbon dioxide!

after watching this video on carbon we discussed how the earth is like a recycling bin. the energy we get from the sun is constantly renewed, but water and other chemical elements (like carbon and nitrogen) on earth are used over and over again as living things take them in, use them, and them put them back into the environment. to demonstrate how the carbon cycle works we did an simple experiment with cabbage juice and some straws! 

for our experiment we poured a small amount of cooled cabbage juice into two cups. next, we took a straw and put it all the way against the bottom of one cup and blew through the straw repeatedly for a couple of minutes until we could see the cabbage juice turn pinker than the juice in the control cup. the carbon dioxide in our breath combined with the water in the cabbage juice to form carbonic acid, causing the pH of the solution to drop and the cabbage juice to turn pink. 

you can hardly notice the difference in this photo, but it was there!

pete's print shop!

pete and laura at pete's print shop gave us an amazing tour of their space...

we even got to experience the printing process- by making our very own RAD t-shirts!

after choosing purple and green for our t-shirts, we got to work!

the temperature gun was definitely a crowd pleaser...

christina and i got our very own totes!!!

a big thanks to laura and pete for an amazing experience!

working on our alphabet book...

celebrating julian's half birthday!

thanks for the delicious brownies raquel!

22 February 2012

making our electroscopes...

we made a contraption called an electroscope using a jar, a nail, cardboard and aluminum foil.

to make an electroscope, we poked a nail into a piece of cardboard and hung strips of aluminum foil inside the jars.

next, we negatively charged our balloons and watched as the hanging strips of foil in our electroscopes moved away from each other, demonstrating that like charges repel from each other!

upon discovering that tissue paper sticks to balloons (tissue paper has a neutral charge while balloons have more negative charges than positive charges), we cut out pieces of tissue paper and made different creatures- without glue or tape!