BIO-HISTORY-ENGLISH HOMEWORK
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bio_lab.docxLab 1 A and D
Lab 1: Scientific Method (lab 1 A and D required) Addresses course outcomes 1-4:
recognize and explain how the scientific method is used to solve problems make observations and discriminate between scientific and pseudoscientific explanations weigh evidence and make decisions based on strengths and limitations of scientific knowledge and the scientific method use knowledge of biological principles and the scientific method to ask relevant questions, develop hypotheses, design and conduct experiments, interpret results, and draw conclusions
The scientific method will be applied to a problem of everyday life. The scientific method tutorial will be used as a basis for understanding various experimental problems
Module 1: The Molecular and Cellular Bases of Life
Lab 1: The Scientific Method
A. Scientific Method Tutorial
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Note: This quiz has not yet been submitted.
In this activity, you will read and participate in the Scientific Method Tutorial , then use what you have learned to complete the assignments below. A link to the tutorial can be found in the WebTycho classroom. Click on the Course Content link to expand the menu, then click on the Science Learning Center link. Before you start reading the tutorial, read the assignment descriptions below. Some of the questions will be similar to those in the tutorial. Then, read the tutorial in order, starting with part 4.
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Note: As you are working the activities in part 4 the tutorial , we recommend that you record your responses in writing or electronically. This will make it easier for you to complete the assignments below, which require you to submit your responses. Consult your instructor if you have any question about this process. |
RIGHT CLICK WITH MOUSE BOTTEN ON LINK AND SELECT OPEN HYPERLINK.
1. Write a paragraph in response to the activity, " Apply the Scientific Method to Everyday Life ," found in part 4 of the Scientific Method Tutorial .( LINK IF CANT OPEN HYPER LINK)( http://tychousa11.umuc.edu/GNSC000/S4-The_Scientific_Method.html?class=1306:BIOL103:C805) Use the questions found in the activity to guide your response (What is your hypothesis? How will you test that hypothesis? Based on the result of this test, what are your conclusions?). POST ANSWERS UNDER QUESTION! I mean here
2. Complete the activity, " Recognizing Good Hypotheses ," found in part 4 of the Scientific Method Tutorial . ( LINK IF CANT OPEN HYPER LINK)( http://tychousa11.umuc.edu/GNSC000/S4-The_Scientific_Method.html?class=1306:BIOL103:C805) Make your choice and check your answer. If you are directed to try again, choose another hypothesis, and re-check your answer. Continue to choose a hypothesis until you have chosen the correct answer. Then answer the following questions:
1. Which hypothesis did you choose first?
2. Why did you choose this hypothesis?
3. How long did it take you to choose the correct hypothesis?
4. What mistakes did you make (if any) in choosing a hypothesis?
5. Explain, in your own words, why the correct hypothesis was the best hypothesis.
3. Locate the jellybean activity in part 4 of the Scientific Method Tutorial, found the subsection, "Variation among Subjects." Before clicking the "Conclusion" link in the activity, record the data and answer the questions as indicated below.
a. Fill in the table below. Start by picking 1 jellybean at a time from the jar (click the "pick 1" button to pick each jellybean) 10 times, until 10 jellybeans have been picked. Record the percentage of green and black jellybeans that appears in the spaces after each jellybean is picked.
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1. Pick 1 jellybean: |
% green |
% black |
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2. Pick 1 jellybean: |
% green |
% black |
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3. Pick 1 jellybean: |
% green |
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4. Pick 1 jellybean: |
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5. Pick 1 jellybean: |
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6. Pick 1 jellybean: |
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7. Pick 1 jellybean: |
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8. Pick 1 jellybean: |
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9. Pick 1 jellybean: |
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10. Pick 1 jellybean: |
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2. Click on the "reset" button.
3. Fill in the Table below. This time, pick 5 jellybeans at a time from the jar (click the "pick 5" button to pick 5 jellybeans at a time) 10 times, until 50 jellybeans have been picked. Record the percentage of green and black jellybeans that appears in the spaces after each group of 5 jellybeans is picked.
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1. Pick 5 jellybeans: |
% green |
% black |
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2. Pick 5 jellybeans: |
% green |
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3. Pick 5 jellybeans: |
% green |
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4. Pick 5 jellybeans: |
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5. Pick 5 jellybeans: |
% green |
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6. Pick 5 jellybeans: |
% green |
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7. Pick 5 jellybeans: |
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8. Pick 5 jellybeans: |
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9. Pick 5 jellybeans: |
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10. Pick 5 jellybeans: |
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4. Click on the "reset" button.
5. Fill in the table below. Pick 10 jellybeans at a time from the jar (click the "pick 10" button to pick 10 jellybeans at a time) 10 times, until 100 jellybeans have been picked. Record the percentage of green and black jellybeans that appears in the spaces after each group of 10 jellybeans is picked.
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1. Pick 10 jellybeans: |
% green |
% black |
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2. Pick 10 jellybeans: |
% green |
% black |
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3. Pick 10 jellybeans: |
% green |
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4. Pick 10 jellybeans: |
% green |
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5. Pick 10 jellybeans: |
% green |
% black |
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6. Pick 10 jellybeans: |
% green |
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7. Pick 10 jellybeans: |
% green |
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8. Pick 10 jellybeans: |
% green |
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9. Pick 10 jellybeans: |
% green |
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10. Pick 10 jellybeans: |
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6. Based on your data collected above, what is your guess for the ratio of green jellybeans to black jellybeans in the entire jar?
% green % black
7. How did you come up with your guess?
8. Which method was the best in helping you make your best guess? Explain your answer.
9. Click on the Conclusion Link. Compare your guess to the actual ratio or green to black jellybeans in the jar.
10. Of the three methods above (selecting 1 at a time, selecting 5 at a time, or selecting 10 at a time), which method showed the actual ratio of green to black jellybeans in the jar at any time during the selection process? Rate each method as to whether you believed that it would provide you with an accurate estimate of the ratio of green to black jellybeans in the jar. Explain your ratings.
Complete the activity, "Interpretation of a Science Study as Presented in the Popular Media," found in part 4 of the Scientific Method Tutorial. Record your answers to the questions in the activity (repeated here) below.
a. What experiments did the scientists perform?
b. What hypothesis was tested?
c. What data were collected?
d. What were the conclusions of the study?
Was the data collected sufficient to support the conclusions made? Explain.
e. Was any important information about how the study was performed left out of the article? If so, what information is missing?
f. Is the title of this article an accurate statement of the study's findings? Why or why not?
Please click the Submit button only once. The server may take some time to process your answer.
Lab 1: The Scientific Method
Module 1: The Molecular and Cellular Bases of Life
B. Environmental Tobacco Smoke and Lung Development Activity
Lab Materials
Materials in your lab kit:
· none
Additional materials you will need:
· online access to the Environmental Tobacco Smoke and Lung Development Activity
Activity
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Participate in the Environmental Tobacco Smoke and Lung Development Activity created by the Southwest Environmental Health Sciences Center. Then answer the following questions.
1. What impact did participating in this activity have on your "observation" skills?
2. Did you have to recount any slides? Did your counting ability improve during the activity? How could you tell?
3. Did you select the correct conclusion on the first try? If not, what conclusion did you select?
4. Most participants accidentally (or by miscounting) try to submit some incorrect data. (If your counts were perfect, good for you!) If the Web site had accepted any incorrect data, how would this have impacted your conclusions? Is this important? Why?
Please click the Submit button only once. The server may take some time to process your answer.
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Warning: Be sure you have filled in every answer box, as you will be able to submit your responses only once.
Module 1: The Molecular and Cellular Bases of Life
Lab 1: The Scientific Method
C. Create a Salad Dressing Using the Scientific Method
Lab Materials
Materials in your lab kit:
· none
Additional materials you will need:
· red wine vinegar
· vegetable oil
· salt
· pepper
Activity
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The goal of this experiment is to create a recipe for the best tasting vinaigrette salad dressing, using only four ingredients: red wine vinegar, vegetable oil, salt, and pepper. Everyone will start with the same basic recipe, then each of you will make your own modifications. You must keep a record of everything that you did to create your salad dressing, including any changes that you made to the recipe along the way. You will be sharing your final recipe with the class so that others can reproduce it and vote on the best tasting salad dressing.
Start with the following basic recipe:
· 3 tablespoons (T) of vinegar
· 3 tablespoons (T) of oil
· 1/4 teaspoon (t) of salt
· 1/8 teaspoon (t) of pepper
Mixing Instructions: Place all ingredients in a bowl in random order and mix all ingredients together at the same time.
Taste your mixture. Then, if you decide more or less of any of the ingredients is needed, make a new batch based on your adjustments, taste the resulting dressing, and record your results. Your adjusted measurements must be at least reasonably measurable (for example, "a pinch" or "a hint" of an ingredient cannot truly be measured). You may make as many adjustments as you choose, until you obtain a vinaigrette salad dressing that you feel is the best tasting. Just be sure to record each adjustment.
Your instructor will have you post your final recipe in a conference a few days before the final lab report is due. At that time, you should print out the other recipes and test each student's recipe. Your instructor will let you know how many of your classmates' recipes you should test. Then, by the due date listed in the syllabus, you should submit the following report:
1. Submit your record of what you did to create your final recipe. Start with the first recipe and make sure to include all changes that occurred as well as your evaluations of the results of each recipe. For example, you should state how each of your recipes tasted, and why you decided to continue adjusting the recipe (as appropriate). Be sure to include how you mixed the ingredients and in what order. Record your final results in the chart below. If you make fewer than 4 recipes, ignore the remaining recipe columns. If you make more than 4 recipes, use the second set of recipe columns.
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Measurements |
Starting Recipe |
1st Recipe |
2nd Recipe |
3rd Recipe |
4th Recipe |
Final Recipe |
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vegetable oil |
3 T |
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red wine |
3 T |
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salt |
1/4 t |
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pepper |
1/8 t |
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2.
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Measurements |
5th Recipe |
6th Recipe |
7th Recipe |
8th Recipe |
Final Recipe |
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vegetable oil |
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red wine |
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salt |
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pepper |
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3. How did your best recipe taste?
4. Which student's salad dressing recipe tastes the best? (You may choose your own.)
5. Explain why this recipe tasted best. Include in your analysis comparisons to other recipes and why you felt they did not taste as good as the chosen recipe.
6. State a hypothesis for this experiment.
7. What was the control in this experiment? Explain your answer fully.
8. How did you test your hypothesis?
9. Did you prove or disprove your hypothesis? How did you decide whether it was proven or not? Explain fully.
10. What is the importance of keeping a complete record of what you did in preparing your recipe?
Please click the Submit button only once. The server may take some time to process your answer.
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Module 1: The Molecular and Cellular Bases of Life
Lab 1: The Scientific Method
D. Designing an Experiment
Lab Materials
Materials in your lab kit:
· none
Additional materials you will need:
· none
Activity
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Assume that your yard has many tall trees that result in about fifty percent of the yard being shaded and fifty percent of the yard being exposed to full sun. The shaded areas and full-sun areas are all intermixed. You are reseeding your lawn and wish to buy only one type of grass seed. The label on Seed 1 states that the grass is excellent in full sun and good in shade, and the label on Seed 2 states that the grass is excellent in shade and good in full sun.
Using the scientific method, design an experiment to determine which seed is best for your lawn. Make sure to account for all steps of the method and to identify your controls.
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1306
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Clea
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Alexander Degtia
alexander.degtiar
guido.braem@fac
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Clea
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adegtiarov
1306:BIOL103:C8
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BIOL103
C805
