Mrs. Renz's 4th Grade Class - JASON Project Lesson 3.2

Students learned about "extremeophiles" by conducting a JASON Project experiment to see if yeast culture would grow in extreme environments. Student groups has three bottles each. Solution 1 contained the extreme environment for that condition, solution 2 was a milder solution, and for each group solution 3 was tap water. Students added yeast and sugar to the mixture in the chart (below) then put a balloon on top of the bottle and observed what happened every 5 minutes for 20 minutes. Students measured the circumference of the balloon and drew conclusions about what was happening. JASON Mysteries of Earth and Mars Student Argonaut, Hillary (my daughter), taught the lesson.

What is in each group’s test solution
Condition	Test solution 1	Test solution 2	Test solution 3
Acidity	5 ml water 95 ml vinegar	5 ml vinegar 95 ml Water	100 ml water
Alkalinity	5 ml water 95 ml detergent	5 ml detergent 95 ml water	100 ml water
Heat	100 ml boiling water	100 ml warm water	100 ml room temperature water
Cold	100 ml water with ice in it	100 ml cold water	100 ml room temperature water
Salinity	300 grams salt 1,000 ml of water	34 grams salt 1,000 ml of water	100 ml water

See copies of the worksheets we used for this lesson.

OUR RESULTS
Acidity Solution 5 minutes
Acidity Solution 10 minutes
Acidity Solution 20 minutes
Salinity Solution 5 minutes
Salinity Solution 10 minutes
Salinity Solution 20 minutes
Alkalinity Solution 5 minutes
Alkalinity Solution 10 minutes
Alkalinity Solution 15 minutes
Alkalinity Solution 20 minutes
Heat Solution 5 minutes
Heat Solution 20 minutes
Cold Solution 5 minutes

Cold Solution 20 minutes

SCIENTISTS AT WORK