Day 2 –Procedures

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!• Introduction due 5/21 (Today for 1st

period)• Procedures due 5/22• MSP Book due 5/22• Variables & Procedures work 5/22• Results due 5/28• Conclusion due 5/30• Last day for late work 6/2Remember, you get 0.5 points of extra credit for submitting typed copies of your work!

TEACHER(TALK WHEN CALLED ON)

Getting your materials1. A – Come to me to get your

substance2. B – Go and get your “plates”3. C – Get your Kit from the back4. D – Will get their lettuce seeds

in a bit.

TEACHER(TALK WHEN CALLED ON)

Serial Dilution• Add 100 mL of water to

the beaker.• Add your substance and

mix.• This is your 100% solution

TEACHER(TALK WHEN CALLED ON)

Serial Dilution• Take 10 mL of your 100%

solution and add it to 90 mL of water (this is your 10% solution).

• Take 10 mL of your 10% solution and add it to 90 mL of water (this is your 1% solution).

TEACHER(TALK WHEN CALLED ON)

Serial Dilution• You should now have a

100%, 10%, and 1% solution.

• The 0% is water!

TEACHER(TALK WHEN CALLED ON)

Plastic Bag

Get a ziplock and label it with your group

member names and period.

TEACHER(TALK WHEN CALLED ON)

Time for the lab!

Use your procedures to conduct the lab!

TEACHER(TALK WHEN CALLED ON)

Clean up!1. A – Cover your “plate” in seran

wrap and put it in your bag. Return it to the kit.

2. B – Clean out your beakers & cylinders.

3. C – Clean up your desk area.4. D – Clean up your desk area.

TEACHER(TALK WHEN CALLED ON)

Put your materials into the box at the side of

the room!

TEACHER(TALK WHEN CALLED ON)

Procedures1. Manipulated Variable2. Responding Variable3. Controlled Variable (at least two)4. Materials list5. Set up Diagram (drawn with labels or written)6. Procedure• State when you record measurements• State how each trial is conducted.• All steps are clear, in logical order, and can be

repeated by others.

TEACHER(TALK WHEN CALLED ON)

Get out a sheet of paper and write the following (leave

enough space between each):PROCEDURES1. Manipulated Variable:2. Responding Variable:3. Two Controlled Variable:4. Materials List:5. Set up diagram:6. Procedures:

TEACHER(TALK WHEN CALLED ON)

Turn in the procedures!

BY YOURSELF(SILENTLY)

Manipulated Variable

What is the manipulated variable?

TEACHER(TALK WHEN CALLED ON)

Manipulated VariableOn your sheet of paper write:

1. Manipulated Variable: [The manipulated variable here]

TEACHER(TALK WHEN CALLED ON)

Responding Variable

What is the responding variable?

TEACHER(TALK WHEN CALLED ON)

Responding VariableOn your sheet of paper write:

2. Responding Variable: [Your responding variable here]

TEACHER(TALK WHEN CALLED ON)

Controlled Variables

What are two important controlled variables in this experiment?

TEACHER(TALK WHEN CALLED ON)

Controlled VariablesOn your sheet of paper write:

3. Controlled Variables: [Your two controlled variables here]

TEACHER(TALK WHEN CALLED ON)

Materials

What materials do you need to conduct this experiment?

IN PAIRS(TALK WITH YOUR GROUP MEMBER)

MaterialsOn your sheet of paper write:

4. Materials: [Your materials here]HINT: I counted 8 materials needed.

TEACHER(TALK WHEN CALLED ON)

Set up Diagram

How will you show how the experiment is set up? A

drawn diagram with labels or written into the

procedures?

IN PAIRS(TALK WITH YOUR GROUP MEMBER)

Set up diagramOn your sheet of paper write or draw with labels:5. Set up diagram: [Your diagram here]

TEACHER(TALK WHEN CALLED ON)

Set up Diagram

How will you show how the experiment is set up? A drawn diagram with labels or written into the procedures (if written,

this will be your first step of your procedure)?

IN PAIRS(TALK WITH YOUR GROUP MEMBER)

Set up diagramOn your sheet of paper write or draw with labels:5. Set up diagram: [Your diagram here]

TEACHER(TALK WHEN CALLED ON)

Procedure

1. When should you take measurements and in what unit?

2. How do you perform each trial?3. How should the steps be ordered

so that someone else can repeat them?

IN PAIRS(TALK WITH YOUR GROUP MEMBER)

ProcedureOn your sheet of paper write :6. Procedure: [Your procedure here]• Tells you when to measure• How each trial is done.• Clear enough for someone else to

use.• MUST BE IN YOUR OWN WORDS!

TEACHER(TALK WHEN CALLED ON)

Work timeProcedures1. Manipulated Variable2. Responding Variable3. Controlled Variable (at least two)4. Materials list5. Set up Diagram (drawn with labels or written)6. Procedure• State when you record measurements• State how each trial is conducted.• All steps are clear, in logical order, and can be

repeated by others.

TEACHER(TALK WHEN CALLED ON)

Exit slipFor your group, with all group members’ names written on it.1. Give me your set up diagram

(drawn with labels OR written).

PROCEDURES ARE DUE TOMORROW!

TEACHER(TALK WHEN CALLED ON)

LAST PERSON CALLED:

(ONLY)

CALL ON A FRIEND FOR HELP!