Chemestiry 100

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Experiment #4

Introduction to the Scientific Method

Report Sheet Name

Date of Experiment 10/23/2022 /20 Points

(20 points) Answer the following questions.

1. Research Question: In your own words, state the question that you would like to answer with this experiment. Be sure to discuss the variables you wish to examine. (1 point)

Is the question complete? Are the dependent and independent variables mentioned?

2. Hypothesis: Write your hypothesis, including both your prediction and your reasoning. (1 point)

Does the hypothesis predict how a change in the independent variable affects the dependent variable? Is the student’s reasoning stated?

3. Identify your variables: (1.5 points)

A. Identify the independent variable. Briefly explain why this is the independent variable:

The independent variable is correctly identified, and the explanation indicates this is the one intentionally manipulated.

B. Identify the dependent variable. Briefly explain why this is the dependent variable:

The dependent variable is correctly identified, and the explanation

indicates this is the one measured as a response.

C. Identify the controlled variables:

Are the controlled variables listed?

4. Procedure: Write the steps you will follow to test your hypothesis. Use complete sentences. These steps might differ from your original proposal. (2 points)

5. Data Record: Create a data table to record your experimental observations, including your independent, dependent, and controlled variables. (2 points)

Is the data table correctly created to record the data relating the independent (x-axis) and dependent (y-axis) variables? Are the columns and rows of the table correctly labeled? Is the data table complete when compared to the procedure listed above?

6. Displaying/Converting Data: a. Record your observations from your experiment in your data table. (2

points)

Are all of the data in the data table?

a. Display your data in graphical form. You may draw a hand graph or create a computer-generated graph. (2 points)

Is the graph correctly created to display the data relating the independent and dependent variables? Are the axes labeled appropriately? Does the data fill the entire graph? Are all of the independent and dependent variable data included on the graph?

7. Looking for a trend in the data (interpreting the graph): Identify and describe any trends or lack of trends displayed on your graph. (2 points)

Are the trends or lack of trends that the graph suggests identified and described?

8. Conclusions:

a. What did you learn from this experiment? Explain how your experimental results support or refute your hypothesis. (2 points)

Did they correctly conclude that the data supported or did not support their hypothesis?

b. Experiments have limitations. What limitations exist in your experiment? (1 point)

c. If you repeated the experiment, explain two improvements you would make to address these limitations and why you would make them. These improvements might fix a problem you encountered with your procedure or allow you to make more interesting conclusions. (1 point)

d. Give an example of an incorrect conclusion that might result from analyzing your data if you had not repeated the procedure multiple times. (1 point)

9. Community Impact. (1.5 points) a. What is a problem affecting your community that could be investigated

with the scientific method? Is there a problem listed related to their community?

b. Propose an experiment to explore this problem. List the independent and dependent variables in the experiment.

Is an experiment proposed?

Does it have both an independent and dependent variable?

c. How could the results from your proposed experiment impact your community?

Is a connection made between what might be learned from the experiment and how the results could impact their community?

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