How will you know you're ready for tomorrow?

If we are going to complete the lab in one day, everyone needs the following complete in their lab manual:

1. STEPS 1-6 (Question, Research, Hypothesis, Experiment Summary, Materials and Procedure, and Scientific Diagram)

2. STEP 7 started (glue in data table and graph)

See below for more details about each part of this if you are not yet done with all of these steps.

What should you do if you complete that before the end of class?

To prepare for the daphnia lab, read Section 3 of the lab manual (pages 28-37 in the purple one that says "From Molecules to Organisms") and answer the questions on page 39 on a separate piece of paper.

If you do not complete this today, you will have to do it as homework tomorrow night before the daphnia lab.

What should Steps 1-6 look like?

STEP 1 - Question: How does the concentration of sucrose affect the rate of cellular respiration in yeast?

STEP 2 - Research: at least 3 fact relevant to cellular respiration or yeast or other things. The lab manual (section 2) is a great place if you are struggling.

STEP 3 - Hypothesis: "The rate of cellular respiration in yeast (increases/decreases/isn't affected) when the concentration of sucrose increases."

STEP 4 - Experiment Summary: This should be a paragraph that includes the following:

• Independent Variable (the thing YOU are changing each time)
• Dependent Variable (the thing you are measuring each time)
• Constants (things that don't change each time)
• One sentence summary of what you are doing

STEP 5 - Materials and Procedure:

• warm water
• 6 grams of yeast
• 6 grams of sugar (sucrose)
• 3 test tubes
• 3 balloons
• 2 graduated cups
• 1 spoon
• 1 dry-erase marker
• 1 digital scale
• 1 craft stick
• 1 stopwatch
• 1 caliper

Also, write a procedure for how you will perform the test in each trial. Make sure you are ONLY changing the amount of sucrose (not the amount of water or the time)

STEP 6 - Scientific Diagram: Draw a 1/2 page diagram that shows how you will set up your experiment. Make sure each material on the materials list is shown on your drawing.

If you are confused about any of these steps, ask a group that has already completed their write-up.