A 40 percent chance of showers, mainly after 3am. Increasing clouds, with a low around 60. North wind around 6 mph becoming east southeast after midnight.
Thursday
A 30 percent chance of showers, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 76. Breezy, with a northwest wind 9 to 14 mph increasing to 17 to 22 mph in the morning. Winds could gust as high as 33 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Clear, with a low around 53. Breezy, with a northwest wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 30 mph.
Bromthymol blue was added as an indicator to check for CO2 production.
Controls and variables and test tubes, oh my! The 7th grade Life Science students recently completed their first lab in the science room. They set out to prove that warmed yeast was living by testing for the presence of carbon dioxide.
They had learned that cells go through a process called cellular respiration, one of the 5 life processes. During cellular respiration, cells break down sugar to release energy. Students first set up a control test test tube with sugar and bromthymol blue (an indicator that turns yellow in the presence of CO2). In a second tube they also included warmed yeast. Their third included the same 'ingredients' as test tube one, but also boiled yeast.
After the long Labor Day weekend, students were able to see that the test tube with the warmed yeast had turned yellow--proving the presence of carbon dioxide, therefore proving cellular respiration had taken place!
After the long weekend, Zoey, Kelsey, and Taya found test tube #2 had turned yellow--proving that cellular respiration had taken place.
