Salinity & Mung Beans Designing a Controlled Experiment.

Salinity & Mung BeansSalinity & Mung Beans

Designing a Controlled Experiment

The ScenarioThe ScenarioFarmers in the central valley of California have become increasingly concerned about the build-up of salt in the soil and water. Farmers know that small amounts of salt in the soil and water will not adversely affect the germination and

growth of their crops. But as the salt concentration increases, negative impacts occur.

Eventually salt concentration may become so great that seeds will no longer germinate.

Your JobYour JobThese farmers want your “company” to do the research

and present them with a report that show how

increasing salt concentrations will affect the

germination of their seed crops. They need to know the

relationship between salt concentration and the percent

of seeds germinating as well as the average growth.

The RequirementsThe Requirements Your lab report must be typed and turned into me

to me by Friday, Sept. 9. It will follow the format (slides to follows). Failure to do so will result in a deduction of points.

The experiment will run for 11 days with 5 days to type out and submit. This is a group experiment (you will share data, tables, charts, observations) but the lab report is INDIVIDUAL.

The Relationship Between Salt Concentration and the Germination of

Mung Bean Seeds

By Happy FeetPeriod 2

Other group members include:Sad Feet

Happy ArmsPretty Eyes

Lab Report Format for this ClassLab Report Format for this ClassI. State the purpose: “At what percent concentration of salt will

mung beans stop germinating? What is the relationship

between salt concentration and percent of germination?”

II. State the hypothesis

III. Perform the experiment

A. Materials

B. Procedure

C. Controls & Variables

1) Describe the control group

2) Describe the experimental group

3) Identify the controlled variables of the experiment.

4) Identify the independent variable

5) Identify the dependent variable

IV.Organize the Data

A. Recorded Data – table I initialed

B. Processed Data - none

C. Graphs, tables, and charts – bar

graph

Lab Report Format for this ClassLab Report Format for this Class

V. Conclusion (continued)…Do not write the questions. Write in complete sentences.

A.Restate the problem that you were solving.

B.State your results.

C.What do your results mean? What is the relationship between salt concentration and the percent of seeds germinating?

D.Did you solve the problem or answer the question? Explain.

E.What was your hypothesis?

F.Was your hypothesis correct? Why or why not? Refer to your experiment and/or data.

V. Conclusion (continued)…Do not write the questions. Write in complete sentences.

G. Complete the following:

1. “Before this lab, I never knew…”

2. “As a result of this lab, I learned…”

3. “Because of this lab, I would like to learn more about…”

H. Reflection.

1. What did you think of the lab or activity?

2. What did you enjoy the most?

3. The least enjoyable (do not say… “writing this report”. I want actual thought and reason)

I. If you had to do the lab or activity again, how would you improve it? “Nothing” is unacceptable. There is always room for change with everything we do in life.

Other information… You will have 1 control group (if it dies you get no

higher than a D grade) 4 cups for the experimental group.

In the materials section of your lab report, you will list the materials in a table, bullet style

You will pre-mix all salt solutions and store in water bottles

Remember the activity “Can it be replicated?” Write detailed and precise procedures (use Step 1, Step 2).

Other information…(continued)

I must initial your table/chart each day measurements and observations are taken.

You will have to scan the original data table/chart that has my initials and put it into your report.

You will include pictures. Ok to use cell phone Your data will be placed into a graph. If you do your graph on

graphing paper, it must be scanned and put it into your report. I must see the table/chart you will use to collect your data

before you begin the experiment. The table/chart must includes labels and titles

Other information…(continued)

Show me your list of materials needed. I will tell you what I have and what you need to bring it.

We start this Wednesday/Thursday.