Day 4 – Collecting Data

ASSESSING TOXIC RISK

Do now1. Turn in your MSP

book, variables sheet, and the procedures work from last week (NOT THE ONES FOR TODAY)

IN YOUR GROUPS(QUIET TALKING)

Agenda1. Submit Introduction &

MSP stuff2. Due dates3. Serial Dilutions4. Set up5. Turn in Procedures

TEACHER(TALK WHEN CALLED ON)

Due Date Reminders!• Results due 5/28• Conclusion due 5/30• Last day for late work

6/2

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Extra Credit!1. 0.5 points for typed work on

results and conclusion!2. 1 point for presenting tomorrow.

(sign up at the end of class)3. 2 points for writing background

information for the lettuce seed (Lactuca sativa). Come in after school for information.

TEACHER(TALK WHEN CALLED ON)

Measuring Radicle Length

If your seed sprouted, then there should be a radicle. The easiest way to identify it is to look for the “fuzzy” part of the root.

TEACHER(TALK WHEN CALLED ON)

TEACHER(TALK WHEN CALLED ON)

Radicle Length

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Measuring Radicle Length1. Place one end of the radicle

against the “0 mm” point on your ruler.

2. Using the tweezers gently stretch the root along the ruler.

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Radicle Length

TEACHER(TALK WHEN CALLED ON)

Measuring Radicle Length1. The part above the fuzzy area does

not count in your measurement.2. You will be measuring growth in

millimeters.3. If your seed did not germinate, it

counts as a 0mm.4. Remember to record and average

your data!

TEACHER(TALK WHEN CALLED ON)

Getting your materials1. A – Get data sheets for your

group2. B – Go and get your “plates”3. C – Get your Kit from the back4. D – Organize your materials.

TEACHER(TALK WHEN CALLED ON)

Measuring Radicle Length

1. The part above the fuzzy area does not count in your measurement.

2. If your seed did not germinate, it counts as a 0mm.

TEACHER(TALK WHEN CALLED ON)

Clean upA. Throw away your bag and

dishes.B. Clean up your kit and put it

in the back.C. Bring your data table up to

me for a moment.D. Collect conclusion sheets for

your group.

TEACHER(TALK WHEN CALLED ON)

Results1. Average your results.2. Decide on a graph type.3. Begin graphing.4. When you are done, discuss

as a group what could have caused your results.

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Results1. Your data table2. A graph3. A statement about if your

hypothesis was correct or incorrect.

THIS IS DUE TOMORROW!

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ConclusionDone as you’ve always done it (mostly):

1. Your data copied into the table at the top.2. The hypothesis is (correct/incorrect).3. The high average data point is (X mm) for (the

manipulated variable).4. The low average data point is (Y mm) for (the

manipulated variable).5. The difference between the high average data

point and the low average data point is (X mm – Y mm).

6. A conclusion statement stating why you think you got this result.

TEACHER(TALK WHEN CALLED ON)

PresentationYou will be presenting the following:

1. A group member’s graph2. A group member’s conclusion3. What can be researched further based on your

data.4. What you could change if you did this type of

bioassy again.5. What the results mean in the real world.6. Why it could be important for people to know.Must be more than one minute and less than five minutes!1 point extra credit for presenting tomorrow

TEACHER(TALK WHEN CALLED ON)

Work timeWork on:1. Your data table. (due 5/28)2. Your graph. (due 5/28)3. Your conclusion. (due 5/30)4. Your group presentation.

(5/28, 5/29, 5/30)

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Moment of ZenToxicology, in one form or another, has been around

thousands of years.

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Ancient Timeline of Toxicology• 2695 BCE: Shen Nung (China) conducts

extensive research into herbs took place in.

• 1500 BCE: The Ebers Papryus (Egypt), a medical text, was written. It contained information of various toxins.

• 25 BC: Aulus Cornelius Celsus (Roman) wrote the Celsus De Medicina, a catalog of medical knowledge, including toxins.

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Exit slip

Was your hypothesis correct or incorrect? Why do you think this

happened?

RESULTS ARE DUE TOMORROW!

TEACHER(TALK WHEN CALLED ON)

LAST PERSON CALLED:

(ONLY)

CALL ON A FRIEND FOR HELP!