Archive for February, 2015

Sick Day (With Yeast!)

What do you do while stuck at home with a sick three-year-old? Bake bread! Well, okay, I did the baking, but Z requested a science experiment. Who am I to pass that by?

Because he so loved the baking soda and vinegar stuff, I gave Z some yeast, water, sugar, a funnel, cups, and balloons. First, we took a look at what yeast does with cold, warm, and hot water. IMG_0833

Then, he (mostly carefully) scooped some yeast and sugar into balloons, and added different temperatures of water to each. Check this out! The green balloon is cold, pink is warm, red is hot. In Z’s words, pink wins! Yeast must like warm water. (The blue balloon is a whole bunch of everything.)
IMG_0834

This was more interesting to me. About two hours later:
IMG_0835
Green and pink are now basically the same size. The red (hot water) balloon must have killed a lot of the yeast.

Advertisements