Think about the lab procedure you just read. Label each factor below V if it was variable during the procedure or C if it was constant. molecule size (large starch molecules vs. small glucose molecules)
material used as the membrane
amount of substances used
number of trials
whether the molecules diffused through the membrane (tubing)

How is the motion of the particles of water at 80 ⁰c different from the motion of the particles of water when it is 30 ⁰c?

Photosynthesis converts light energy to chemical energy. which molecules are the end product of this transformation of energy in this reaction?

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.