A student investigates if extra yeast (who do cellular respiration) or extra sugar will
produce the most gas when mixed in a warm water and yeast solution.
sso
he uses two bottles with y cup of warm water. to the first bottle, he adds 2 teaspoons
of yeast and 1 teaspoon of sugar and then puts the balloon on top. he adds 2 teaspoons
of sugar and 1 teaspoon of yeast to the second one, then puts on the balloon. he waits
and records the changes in the size of the balloons as they fill with gas.
oard
what did he forget to do and what gas is produced?
set up a control; co2
o set the time: co2
o measure the temperature change: 02
set up a control; o2