experiment design: feel the beat - porter school · · 2015-04-061 experiment design, feel the...

1 Experiment Design, Feel the Beat Science Performance Task, Connecticut

Name _______________________ Period ________ Due: ___________

Curriculum-Embedded Performance Task Grade 7 Science Content Standard 7.2

Experiment Design:

Feel the Beat

Connecticut State Department of Education 2011 Edition

Modified: B.Kleinman, 2/2014


Methods for Measuring Pulse Rate

There are two methods for measuring pulse. You should sit quietly for several minutes before

measuring your “resting” pulse rate. You are to take your own pulse rate. Your partner may

time you. Try both ways, and then decide which way works best for you:

Wrist Method: With the palm of your partner’s hand facing up, place the tips of your

first two fingers on the fleshy part of

your partner’s thumb. Slide your

fingers about 2 inches toward the

wrist, stop, and press firmly to feel the

pulse of blood which each heart beat

sends through the artery. To measure

heart rate, count the number of

pulses in 30 seconds. Multiply that

number by 2 and you will have the

number of beats per minute (“bpm”).

Neck Method: Place the tips of your

first two fingers on either side of

your windpipe, near the lump, called

an Adam’s apple, in the middle of

your neck. Press gently until you

can feel a pulse. To measure heart

rate, count the number of pulses in

30 seconds. Multiply that number

by 2 and you will have the number

of beats per minute (“bpm”).

Illustration Copyright © 2005 Nucleus Medical Art. All rights reserved. www.nucleusinc.com

Illustration Copyright © 2005 Nucleus Medical Art. All rights reserved. www.nucleusinc.com

http://www.nucleusinc.com/

http://www.nucleusinc.com/


Inquiry--Exploration

Explore 1. Practice finding your pulse on your wrist or neck (Use 2 fingers and press down lightly).

Count the beats for 10 seconds and jot it down.

_________

2. How can you determine your pulse rate per minute?

__________________________________________________________________

3. How many beats did you have per minute? __________________

4. What is bpm? _______________________________________

5. What is “resting rate?”

__________________________________________________________________

__________________________________________________________________

6. Why will you take your resting rate in your experiment?

____________________________________________________________________

____________________________________________________________________


Inquiry-Raising Questions

INVESTIGATION: EFFECT ON PULSE RATE

Recall your initial heart rate observations and consider what you have learned about the

circulatory and respiratory systems in the Human Body Unit.

We already know that physical activity causes heart rate to increase.

What other variables might cause the heart to beat faster or slower? You might consider

height or body position (lying down, standing, sitting) or you might be interested in exploring

environmental factors, such as temperature, sound, or lighting.

With your partner, list out some possible factors you would like to explore:

________________________________________________

________________________________________________

________________________________________________

________________________________________________

With your partner, choose TWO comparative factors that can be investigated through a

scientific experiment in THIS classroom. (For example: Reading silently vs. reading aloud).

______________________________________________________________________________


Inquiry-Experiment Design

EFFECT OF DIFFERENT VARIABLES ON PULSE RATE

Work with your partner(s) to plan a controlled experiment.

PLAN YOUR EXPERIMENT

Using your selected activities…

Write the question you are investigating: ______________________________________________

________________________________________________________________________________

DEPENDENT VARIABLE (data): ____________________________________

INDEPENDENT VARIABLE (experimenter decides): __________________________________

CONTROLLED VARIABLES (keep the same throughout):

_________________________________________________________________________________

_________________________________________________________________________________

HYPOTHESIS (If…(IV), then…(DV)):

_________________________________________________________________________________

_________________________________________________________________________________

I made this hypothesis because

_________________________________________________________________________________

_________________________________________________________________________________

MATERIALS LIST:

______________________

______________________

______________________

______________________


Inquiry-Experiment Design II

DESIGN AN EXPERIMENT PROCEDURE to explore how different types of activity affect pulse rate.

Using your selected activities, describe how you will change the independent variable, measure the

dependent variable, and keep the other factors constant in your experiment. Include enough detail

so that you or someone else could repeat your experiment and get similar outcomes. You will

conduct at least 3 trials of each activity (including your resting rate). PROCEDURE Write in numbered step form. _________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

_________________________________________________________________________________

*Get your teacher’s approval before you begin your experiment.________________


Inquiry-Data Collection

Recording Data

DATA TABLE

Create a data table either on the following grid page. Make sure to include

the following:

Use a ruler for the lines

A title (The Effect of the IV on the DV)

Labels

o Trials—3 for each activity including resting rate

o Average for each activity

o Units (bpm)

Conduct your experiment and collect data.

Remember to ask yourself:

Do your data seem reasonable?

If not, go back and retest that trial!


Inquiry-Data Analysis

Analyzing Data: Graphing

GRAPH

Look at your data table. Determine what information you will graph and

what style graph* best represents this type of data. Use the following grid

page for your graph.

Make sure to include the following:

Use a ruler for the lines

A title (The Effect of the IV on the DV)

Label the x-axis and y-axis

o Include units where appropriate

Reasonable y-axis scale

Key

o Color coded (colored pencils)—one color per person

*Line Graph—shows a change over time.

Bar Graph—compare things.

Plot appropriate and accurate data that will lead you to a

scientific conclusion!


Inquiry-Communicating Conclusions

CONCLUSIONS What conclusion can you make based on your data? Write a draft report describing your experiment on the pages provided. Each paragraph should be 5 or more sentences. Then, in your lab group, peer edit each others’ papers. Make any changes necessary. **No fluff!** (Extra stuff that is written to take up space to meet paragraph requirements.) Your report should include: Paragraph 1

Was your hypothesis supported by the data? Why or why not?

Summarize your experiment. What were you testing? Paragraph 2

How did the activity affect heart rate? Use specific data points to support your statement.

Explain your results in scientific terms based on what you know about the human body and the cardiovascular system.

Paragraph 3

Error analysis: Compare your written procedure to what actually occurred during data collection. What errors occurred? If you were to do this experiment again, what could you do to avoid errors?

What new questions do you have about changes in heart rate? What ideas do you have for new experiments on heart rate (if you didn’t have the limitations of the classroom)?

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________


______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________


______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________

______________________________________________________________________________


Formal Lab Report Directions:

1. You are to TYPE up a formal lab report.

Use the font, Calibri, size 11 (default settings).

Set the line spacing to 2.0 for the written sections.

2. Write using complete sentences.

Use proper conventions: punctuation, spelling, and grammar.

REVISE—content, wording.

EDIT—fix conventions.

Avoid using personal pronouns in science writing—NO I, me, or we. You would instead

say, the subject(s) or the student(s).

3. Each section should be separate and identifiable by its header which is to be underlined. See

below.

*************************************************************************

Name Date Due

Title Block #

Purpose (5 sentences minimum)

What you are investigating—rephrase your scientific question into a statement.

Write a statement describing each of the variables—three sentences total. One for the

independent variable, the dependent variable, and the controlled variables.

Write a sentence describing the control for this experiment.

Hypothesis (2 sentences minimum)

State your hypothesis.

Explain your reasoning (from the “because” section on your plan sheet).

Materials

List out the materials necessary to carry out the experiment.

Use a bulleted format.

Procedure

Step by step instructions to do your experiment.

Must be replicable!

Use a numbered format:

1.

2.

3.…


Results

Recreate your data table either in Word (using the chart tools) or in Excel. Make sure the table

has a proper title and labels.

For the graph, you may either do it by hand neatly using a ruler OR on the computer in Word or

Excel (only if you already know how). Make sure your graph has a proper title and labels. If your

original graph is exceptionally done, you may remove it from the packet and include into the

formal report.

Conclusion (3 paragraph minimum, at least 5 sentences per paragraph)

Use the paragraph guidelines from page 11.

Remember to indent each new paragraph—hit the ‘Tab’ key once.

See me with any specific questions or to set up a time for extra help writing

your formal lab report.

experiment design: feel the beat - porter school · · 2015-04-061 experiment design, feel the...

Documents